CN112649976A - Display screen, display screen laminating process and electronic equipment - Google Patents

Display screen, display screen laminating process and electronic equipment Download PDF

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Publication number
CN112649976A
CN112649976A CN201910963422.1A CN201910963422A CN112649976A CN 112649976 A CN112649976 A CN 112649976A CN 201910963422 A CN201910963422 A CN 201910963422A CN 112649976 A CN112649976 A CN 112649976A
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China
Prior art keywords
cover plate
display module
protective cover
hole
display screen
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CN201910963422.1A
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Chinese (zh)
Inventor
王强
宋小荣
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Nanchang OFilm Multimedia New Technology Co Ltd
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Nanchang OFilm Multimedia New Technology Co Ltd
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Priority to CN201910963422.1A priority Critical patent/CN112649976A/en
Publication of CN112649976A publication Critical patent/CN112649976A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Polarising Elements (AREA)

Abstract

The invention relates to a display screen, a display screen laminating process and electronic equipment. The attaching process comprises the following steps: a bonding step: arranging optical cement on the protective cover plate and/or the upper polaroid of the display module, and attaching the protective cover plate and the upper polaroid together to realize the connection of the protective cover plate and the display module; a defoaming step: defoaming the protection cover plate and the display module which are connected together to remove bubbles between the protection cover plate and the display module so that optical cement completely fills a gap between the protection cover plate and the display module, wherein the gap between the protection cover plate and the display module comprises a first through hole; and (3) curing: and after the defoaming step is completed, curing the optical cement to completely cure the optical cement. In the invention, the optical adhesive layer is used for completely filling the first through hole, so that the interference of air when external light is transmitted into the front camera module from the camera area can be avoided, and the shooting effect can be further improved.

Description

Display screen, display screen laminating process and electronic equipment
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a display screen, a bonding process of the display screen and electronic equipment.
Background
The current screen occupation ratio (namely the proportion occupied by the display area) of the display screen is gradually becoming the mainstream trend of the mobile phone, in order to improve the screen occupation ratio, the problem of placing a front camera module is bound to be solved, and the current method is to dig a hole on the display screen to form a camera area which can enable light to pass through.
The display screen generally includes a display module and a protective cover plate disposed on the display module, wherein the display module includes an upper polarizer, a liquid crystal module, a lower polarizer, and a backlight module, which are stacked in sequence, and the upper polarizer is connected to the protective cover plate. The specific method for digging the hole on the display screen comprises the following steps: the upper polaroid is provided with a first through hole penetrating through the upper polaroid, the lower polaroid is provided with a second through hole penetrating through the lower polaroid, the backlight assembly is provided with a third through hole penetrating through the backlight module, the second through hole and the third through hole are communicated to form an installation space for installing the front camera module, and light outside the mobile phone can sequentially penetrate through the cover plate glass, the first through hole and the liquid crystal assembly and then is transmitted into the front camera. However, this design can result in reduced imaging quality of the handset.
Disclosure of Invention
In view of the above, it is desirable to provide a display panel, a bonding process for the display panel, and an electronic device.
A display screen, the display screen comprising: a protective cover plate; the display module comprises an upper polaroid and a liquid crystal assembly, wherein the upper polaroid is connected with the protective cover plate and is provided with a first through hole penetrating through the upper polaroid; the liquid crystal assembly is connected with the surface of the upper polaroid, which is far away from the protective cover plate, and light can pass through the area of the liquid crystal assembly, which is opposite to the first through hole; the optical adhesive layer is used for connecting the protective cover plate and the display module, and comprises a connecting part and a filling part in the direction from the protective cover plate to the display module; the connecting part is arranged between the protective cover plate and the upper polaroid and is used for connecting the protective cover plate and the upper polaroid; the filling part is arranged on the surface, far away from the connecting part, of the connecting part and filled in the first through hole, and the filling part is respectively attached to the liquid crystal layer and the hole wall of the first through hole.
In the invention, the optical adhesive layer is used for completely filling the first through hole, so that the interference of air when external light is transmitted into the front camera module from the camera area can be avoided, and the shooting effect can be further improved.
Furthermore, the display module further comprises a lower polarizer, the lower polarizer is connected with the surface of the liquid crystal assembly, which is far away from the upper polarizer, the lower polarizer is provided with a second through hole penetrating through the lower polarizer, and the second through hole and the first through hole are coaxially arranged; and/or the display module further comprises a backlight assembly, the backlight assembly is connected with the surface of the lower polarizer, which is far away from the liquid crystal assembly, the backlight assembly is provided with a third through hole which penetrates through the backlight assembly, and the third through hole and the first through hole are coaxially arranged.
A display screen laminating process comprises a protective cover plate and a display module, wherein the display module comprises an upper polaroid and a liquid crystal module, the upper polaroid is connected with the protective cover plate, and the upper polaroid is provided with a first through hole penetrating through the upper polaroid; the liquid crystal module with go up the polaroid and keep away from the surface of protection apron meets, the liquid crystal module with the region relative of first through-hole can make light pass, the laminating technology is used for setting up the optical cement layer between the protection apron of display screen and the display module assembly, the laminating technology includes: a bonding step: arranging optical cement on the protective cover plate and/or the upper polarizer of the display module, and attaching the protective cover plate and the upper polarizer together to realize the connection of the protective cover plate and the display module; a defoaming step: defoaming the protection cover plate and the display module which are connected together to remove bubbles between the protection cover plate and the display module and enable the optical cement to completely fill a gap between the protection cover plate and the display module, wherein the gap between the protection cover plate and the display module comprises the first through hole; and (3) curing: and after the defoaming step is completed, curing the optical cement to completely cure the optical cement.
In the invention, the optical adhesive layer is used for completely filling the first through hole, so that the interference of air when external light is transmitted into the front camera module from the camera area can be avoided, and the shooting effect can be further improved.
Further, after the defoaming step and before the curing step, an appearance inspection step is further included: carrying out appearance inspection on the connected protective cover plate and the display module to judge whether bubbles exist between the protective cover plate and the display module; and if no bubble is detected between the protective cover plate and the display module, curing the optical cement.
Further, in the appearance inspection step, if it is detected that bubbles exist between the protective cover plate and the display module, the defoaming step is repeated, so that the protective cover plate and the display module which are connected together are defoamed again, and the yield of the display screen can be improved.
Further, in the curing step, the optical cement is irradiated by ultraviolet light to cure the optical cement, so that the curing speed of the optical cement can be improved.
Furthermore, the energy of the ultraviolet light is more than or equal to 3000mJ/cm2, so that the curing effect of the optical cement is better.
Furthermore, the optical cement is OCA cement, so that the production efficiency is improved.
Further, in the attaching step, attaching the OCA glue to a protective cover plate, and then attaching the OCA glue to the upper polarizer; and/or in the defoaming step, heating the OCA glue first, and then applying pressure to the OCA glue; and/or in the defoaming step, the defoaming temperature is 54-66 degrees, the defoaming pressure is 0.25-0.35 mpa, and the defoaming time is 15-25 min, so that the defoaming effect can be improved, and the yield of the display screen can be improved; and/or the OCA glue is CEF7106 type optical glue.
An electronic device, comprising: a display screen, as described above; the front camera module is opposite to the camera area of the display screen and used for imaging according to light rays transmitted from the camera area.
Drawings
FIG. 1 is a front view of an electronic device provided by the present invention;
FIG. 2 is a partial cross-sectional view of an electronic device provided by the present invention;
fig. 3 is a schematic view illustrating a bonding manner between a protective cover plate and a display module according to the present invention;
fig. 4 is a graph of uv energy versus cure rate of optical cement provided by the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 and fig. 2, in the present embodiment, the electronic device 1000 includes a display screen 100 and a front camera module 200, wherein a camera area 20 allowing light to pass through is disposed in a visible area 10 of the display screen 100, and the front camera module 200 is opposite to the camera area 20 so as to receive light entering from the outside of the electronic device 1000, and further perform imaging. This arrangement is more favorable for improving the screen occupation ratio of the display screen 100, and is further favorable for realizing the overall screen design of the electronic device 1000. In addition, in the embodiment, the electronic device 1000 may be a terminal product such as a mobile phone and a tablet computer.
As shown in fig. 2, in the present embodiment, the display screen 100 includes a protective cover 30 and a display module 40 stacked together. The protective cover 30 is a transparent plate, such as a glass plate or a resin plate. The display module 40 includes an upper polarizer 1, a liquid crystal module 2, a lower polarizer 3 and a backlight module 4 stacked in sequence. The area of the upper polarizer 1 corresponding to the image pickup area 20 is provided with a first through hole 11 penetrating through the upper polarizer 1, the area of the lower polarizer 3 corresponding to the image pickup area 20 is provided with a second through hole 31 penetrating through the lower polarizer 3, the area of the backlight assembly 4 corresponding to the image pickup area 20 is provided with a third through hole 41 penetrating through the backlight assembly 4, and light outside the electronic device 1000 can sequentially pass through the protective cover 30, the first through hole 11, the liquid crystal assembly 2, the second through hole 31 and the third through hole 41 and then reach the inside of the electronic device 1000. In the actual product, leading module 200 of making a video recording can directly inlay and establish in second through-hole 31 and third through-hole 41, and at this moment, the camera lens of leading module 200 of making a video recording can be with liquid crystal assembly 2 butt, like this light pass behind first through-hole 11 and the liquid crystal assembly 2 alright transmit into in leading module 200 of making a video recording. In the present embodiment, the first through hole 11, the second through hole 31, and the third through hole 41 are coaxially arranged, and the three through holes are all circular holes.
In this embodiment, the diameter of the first through hole 11 is smaller than the diameters of the second through hole 31 and the third through hole 41, wherein the diameter of the first through hole 11 is between 3.08 mm and 4.5 mm, which not only ensures the display effect of the display screen 100, but also avoids adverse effects on the touch operation.
As shown in fig. 2, in the present embodiment, the display screen 100 further includes an optical adhesive layer 50, and the optical adhesive layer 50 is used to connect the protective cover 30 and the display module 40 together. The optical adhesive layer 50 includes a connection portion 5 and a filling portion 6 in a direction from the cover plate to the polarizer. Wherein, the connecting part 5 is arranged between the protective cover plate 30 and the upper polarizer 1 and is used for connecting the protective cover plate 30 and the upper polarizer 1 together; the filling part 6 is disposed on the connecting part 5, filled in the first through hole 11, and respectively attached to the liquid crystal layer and the hole wall of the first through hole 11, that is, the filling part 6 completely fills the first through hole 11. This can prevent the external light from interfering with the front camera module 200 when it is introduced from the camera area 20, and improve the shooting effect.
As shown in fig. 2, in the present embodiment, the liquid crystal assembly 2 includes a first glass cover plate 21 and a second glass cover plate 22, and a liquid crystal layer 23 disposed between the two glass cover plates, wherein the upper polarizer 1 is connected to a surface of the first glass cover plate 21 away from the liquid crystal layer 23, and the lower polarizer 3 is connected to a surface of the second glass cover plate 22 away from the liquid crystal layer 23.
In addition, as shown in fig. 2, the region of the liquid crystal layer 23 opposite to the first through hole 11 (defined as the light transmitting region 231) is not provided with liquid crystal. Specifically, the liquid crystal module further includes a spacer 24, one end of the spacer 24 abuts against the first glass cover plate 21, and the other end of the spacer 24 abuts against the second glass cover plate 22, so that the liquid crystal can be prevented from entering the hollow portion of the spacer 24, and at this time, the hollow portion of the spacer 24 is the light-transmitting region 231.
As shown in fig. 2, the backlight assembly 4 includes a light source, a reflective plate 41 and a diffusion plate 42, wherein the diffusion plate 42 is connected to the lower polarizer 3, the reflective plate 41 is connected to a surface of the diffusion plate 42 away from the lower polarizer 3, and the light source is disposed on the reflective plate 41 and outside the diffusion plate 42. It is understood that in an actual product, the liquid crystal module 2 and the backlight module 3 further include other film layers, and the embodiment will not be described herein. In addition, in other embodiments, the liquid crystal assembly 2 and the backlight assembly 4 may be arranged in other manners.
Aiming at the display screen 100, the invention also provides a bonding process so as to improve the yield of the display screen 100. The process mainly comprises the following steps.
Step S1, bonding step: and arranging optical cement on the protective cover plate 30 and/or the upper polaroid 1, and attaching the protective cover plate 30 and the upper polaroid 1 together to realize the connection of the protective cover plate 30 and the display module 40.
In this step, the protective cover plate 30 and the display module 40 are connected by using optical cement, wherein, as shown in fig. 3, in this embodiment, the optical cement is OCA cement, the OCA cement is a semi-solid cement, and during production, a release film on one side of the OCA cement is firstly torn off (the release film is attached to the outer side of the OCA cement when the OCA cement leaves a factory), and the OCA cement is attached to the protective cover plate 30; then tear the release film that the OCA glued the opposite side again, glue OCA and go up the laminating of polaroid 1, and then realize being connected of protection cover plate 30 and display module assembly 40. Then, pressure is applied to the protective cover 30 or the display module 40 to fill the OCA glue in the first through hole 11, wherein the application of force may be manual application of force, and at this time, air bubbles exist between the OCA glue and the sidewall of the first through hole 11, that is, the OCA glue cannot completely fill the first through hole 11, so that the filling of the first through hole 11 may be regarded as pre-filling.
In this embodiment, the semi-solid OCA glue can simplify the production process and improve the production efficiency. In addition, in this embodiment, the release films on both sides of the OCA glue are divided into a light film and a heavy film, wherein the thickness of the light film is about 75 microns, and the thickness of the heavy film is about 100 microns, and meanwhile, in this embodiment, the thickness of the OCA glue is about 150 microns. In addition, because protection apron 30 is the flat board, earlier glue OCA and can avoid appearing gluing the problem that the deformation shrink leads to can not cover protection apron 30 completely because of OCA earlier with protection apron 30 laminating, improve the yields of production.
In this example, the OCA glue used was CEF7106 glue from 3M. The light transmittance of the adhesive can reach more than 92%, and the shooting effect of the front camera module 200 can be improved. Simultaneously, the glue has good fluidity, and is more beneficial to completely filling the OCA glue into the first through hole 11.
It should be understood that in other embodiments, the optical adhesive may also be a liquid adhesive, and in this case, the optical adhesive may be coated on the upper polarizer 1 first, or may be coated on both the protective cover 30 and the upper polarizer 1.
Step S2, defoaming step: the protection cover plate 30 and the display module 40 connected together are defoamed to remove air bubbles between the protection cover plate 30 and the display module 40, so that the optical cement completely fills the gap between the protection cover plate 30 and the display module 40.
In the present embodiment, the gap between the cover 30 and the display module 40 includes the gap between the cover 30 and the upper polarizer 1, and the gap between the cover 30 and the liquid crystal device 2 (i.e. the space occupied by the first through hole 11). In this step, the bubble between the protective cover 30 and the display module 40 is removed by a debubbling machine, and the bubble includes a bubble between the protective cover 30 and the OCA glue, a bubble between the upper polarizer 1 and the OCA glue (including a bubble between the inner wall of the first through hole 11 and the OCA glue), a bubble between the liquid crystal module 2 and the OCA glue, and a bubble inside the OCA glue.
In addition, in the embodiment, the defoaming temperature is between 55 ° and 65 °, and the high temperature is used to improve the flowability of the OCA glue, so as to facilitate the OCA glue to completely fill the first through hole 11. Meanwhile, the pressure for defoaming is between 0.25mpa and 0.35mpa, so as to facilitate the discharge of bubbles. During the production process, high temperature can be provided for a period of time, and then pressurization is carried out, namely, the OCA glue is preheated and then pressurized. In addition, in order to ensure the defoaming effect, the defoaming time is generally 15min to 25 min.
It can be understood that, through the defoaming step, the final filling of the first through holes 11 by the OCA glue can be achieved, and in addition, during the actual production, the pre-filling of the first through holes 11 can also be completed in the defoaming step, that is, in the above attaching step, only the protective cover 30 and the display module 40 need to be connected together by the OCA glue.
Step S3, appearance checking step: after the defoaming step, the appearance of the coupled protective cover 30 and display module 40 is checked to determine whether there is a bubble between the protective cover 30 and the display module 40.
In this embodiment, the air bubbles between the protective cover 30 and the display module 40 may be detected by a corresponding detecting instrument, or may be detected by direct visual inspection by a manufacturer. The appearance inspection is qualified, that is, no bubble is detected between the protective cover 30 and the display module 40, and then the next operation can be performed. When the appearance inspection is not qualified, that is, the existence of the air bubbles between the protective cover 30 and the display module 40 is detected, the above-mentioned defoaming step is repeated to improve the yield.
Step S4, curing step: and after the appearance inspection is qualified, the optical cement is subjected to curing treatment so as to completely cure the optical cement.
In order to improve the curing efficiency of the optical cement, in this embodiment, the optical cement is irradiated by ultraviolet light to accelerate the curing of the optical cement. Meanwhile, as can be seen from FIG. 4, when the energy of the UV light reaches 3000mJ/cm2Meanwhile, the curing rate of the optical adhesive can reach more than 70%, and at the moment, the ultraviolet light can initiate molecular chains in the optical adhesive to reach a complete crosslinking state. Therefore, in practical production, the energy of the ultraviolet light is usually set to 3000mJ/cm or more2。
It is understood that, in the case where the defoaming yield is high, the curing step may be performed directly after the defoaming step, that is, the appearance inspection step may be omitted. In addition, in other embodiments, the appearance check may be performed again after the curing step is completed to determine whether bubbles are present in the final product.
The following effects can be achieved by the method: the stability CPK of the OCA laminating process is more than 1.33; the reliability of the filling of the OCA (i.e. the bubble content after filling) is checked to meet the actual requirements; the yield of the whole manufacturing operation is more than 98%.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A display screen laminating process comprises a protective cover plate and a display module, wherein the display module comprises an upper polaroid and a liquid crystal module, the upper polaroid is connected with the protective cover plate, and the upper polaroid is provided with a first through hole penetrating through the upper polaroid; the liquid crystal module with go up the polaroid and keep away from the surface of protection apron meets, the liquid crystal module with the region relative of first through-hole can make light pass, the laminating technology is used for setting up the optical cement layer between the protection apron of display screen and the display module assembly, its characterized in that, the laminating technology includes:
a bonding step: arranging optical cement on the protective cover plate and/or the upper polarizer of the display module, and attaching the protective cover plate and the upper polarizer together to realize the connection of the protective cover plate and the display module;
a defoaming step: defoaming the protection cover plate and the display module which are connected together to remove bubbles between the protection cover plate and the display module and enable the optical cement to completely fill a gap between the protection cover plate and the display module, wherein the gap between the protection cover plate and the display module comprises the first through hole;
and (3) curing: and after the defoaming step is completed, curing the optical cement to completely cure the optical cement.
2. The process of claim 1, further comprising, after the debubbling step and before the curing step, an appearance inspection step of: carrying out appearance inspection on the connected protective cover plate and the display module to judge whether bubbles exist between the protective cover plate and the display module; and if no bubble is detected between the protective cover plate and the display module, curing the optical cement.
3. The display screen attaching process according to claim 2, wherein in the appearance inspection step, if it is detected that air bubbles exist between the protective cover plate and the display module, the defoaming step is repeated so as to perform defoaming treatment on the protective cover plate and the display module which are connected together again.
4. The attaching process of a display screen according to claim 1, wherein in the curing step, the optical cement is irradiated with ultraviolet light to cure the optical cement.
5. The attaching process of a display screen according to claim 4, wherein the energy of the ultraviolet light is greater than or equal to 3000mJ/cm2。
6. The attaching process of a display screen according to claim 1, wherein the optical cement is OCA cement.
7. The attaching process of the display screen according to claim 6, wherein in the attaching step, the OCA glue is attached to the protective cover plate, and then the OCA glue is attached to the upper polarizer; and/or
In the defoaming step, heating the OCA glue, and then applying pressure to the OCA glue; and/or
In the defoaming step, the defoaming temperature is 54-66 degrees, the defoaming pressure is 0.25-0.35 mpa, and the defoaming time is 15-25 min; and/or
The OCA glue is CEF7106 type optical glue.
8. A display screen, comprising:
a protective cover plate;
the display module is provided with a visual area and comprises an upper polaroid and a liquid crystal assembly, wherein the upper polaroid is connected with the protective cover plate, the upper polaroid is provided with a first through hole penetrating through the upper polaroid, and the first through hole is positioned in the visual area of the display module; the liquid crystal assembly is connected with the surface of the upper polaroid, which is far away from the protective cover plate, and light can pass through the area of the liquid crystal assembly, which is opposite to the first through hole; and
the optical adhesive layer is used for connecting the protective cover plate and the display module, and comprises a connecting part and a filling part in the direction from the protective cover plate to the display module; the connecting part is arranged between the protective cover plate and the upper polaroid and is used for connecting the protective cover plate and the upper polaroid; the filling part is arranged on the surface, far away from the connecting part, of the connecting part and filled in the first through hole, and the filling part is respectively attached to the liquid crystal layer and the hole wall of the first through hole.
9. The display screen of claim 8, wherein the display module further comprises a lower polarizer, the lower polarizer is connected to the surface of the liquid crystal module away from the upper polarizer, and the lower polarizer is provided with a second through hole penetrating through the lower polarizer, and the second through hole is coaxial with the first through hole; and/or
The display module further comprises a backlight assembly, the backlight assembly is connected with the surface, away from the liquid crystal assembly, of the lower polarizer, the backlight assembly is provided with a third through hole penetrating through the backlight assembly, and the third through hole and the first through hole are coaxially arranged.
10. An electronic device, comprising:
a display screen as claimed in claim 8 or 9;
the front camera module is opposite to the camera area of the display screen and used for imaging according to light rays transmitted from the camera area.
CN201910963422.1A 2019-10-11 2019-10-11 Display screen, display screen laminating process and electronic equipment Pending CN112649976A (en)

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Application Number Priority Date Filing Date Title
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CN112649976A true CN112649976A (en) 2021-04-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114299825A (en) * 2021-12-30 2022-04-08 霸州市云谷电子科技有限公司 Display module and electronic equipment
US20220141363A1 (en) * 2020-10-29 2022-05-05 Beijing Xiaomi Mobile Software Co., Ltd. Screen assembly, camera system and electronic device
CN115359727A (en) * 2022-09-22 2022-11-18 苏州桐力光电股份有限公司 Screen attaching method, display screen and electronic equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220141363A1 (en) * 2020-10-29 2022-05-05 Beijing Xiaomi Mobile Software Co., Ltd. Screen assembly, camera system and electronic device
CN114299825A (en) * 2021-12-30 2022-04-08 霸州市云谷电子科技有限公司 Display module and electronic equipment
CN115359727A (en) * 2022-09-22 2022-11-18 苏州桐力光电股份有限公司 Screen attaching method, display screen and electronic equipment

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