CN114267711A - Manufacturing method of display device - Google Patents
Manufacturing method of display device Download PDFInfo
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- CN114267711A CN114267711A CN202111583834.6A CN202111583834A CN114267711A CN 114267711 A CN114267711 A CN 114267711A CN 202111583834 A CN202111583834 A CN 202111583834A CN 114267711 A CN114267711 A CN 114267711A
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Abstract
The application relates to a manufacturing method of a display device, the display device comprises a display module and a circuit board, a first light hole is formed in the circuit board, the display module comprises a display panel, a light-transmitting glue layer and a functional layer, the light-transmitting glue layer and the functional layer are sequentially arranged on the backlight side of the display panel in a stacked mode, a through hole capable of exposing the light-transmitting glue layer is formed in the functional layer, and the manufacturing method of the display device comprises the following steps: arranging a light shielding sheet in the through hole, wherein the light shielding sheet is attached to one side of the light-transmitting adhesive layer, which is far away from the display panel, and the orthographic projection of the light shielding sheet on the display panel completely covers the orthographic projection of the through hole on the display panel; carrying out optical alignment on the circuit board and the display module so as to enable the central axis of the first light-transmitting hole to coincide with the central axis of the through hole; and attaching the circuit board to one side of the functional layer, which is far away from the display panel. According to the manufacturing method of the display device, the alignment light is shielded by the shading sheet and cannot irradiate the display panel in the optical alignment process, so that the influence on the display effect of the display panel is avoided.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a method for manufacturing a display device.
Background
With the development of the technology, the under-screen fingerprint identification technology is widely applied due to the characteristics of no occupation of the surface space of the electronic equipment, high identification speed and high identification accuracy. In the display device with the function of fingerprint identification under the screen, a through hole needs to be reserved below the display panel so as to allow light rays required by the working of the fingerprint identification sensor to pass through.
However, in the manufacturing process of the display device, alignment light during optical alignment passes through the through hole below the display panel and irradiates the display panel, which affects the display effect.
Disclosure of Invention
Therefore, it is necessary to provide a method for manufacturing a display device, which aims at the problem that alignment light in optical alignment passes through a through hole below a display panel and irradiates the display panel to affect the display effect of the display panel in the manufacturing process of the display device.
The embodiment of the application provides a manufacturing method of a display device, the display device comprises a display module and a circuit board, a first light hole is formed in the circuit board, the display module comprises a display panel, a light-transmitting glue layer and a functional layer, the light-transmitting glue layer and the functional layer are sequentially arranged on the backlight side of the display panel in a stacked mode, a through hole capable of exposing the light-transmitting glue layer is formed in the functional layer, and the manufacturing method of the display device comprises the following steps: arranging a light shielding sheet in the through hole, wherein the light shielding sheet is attached to one side of the light-transmitting adhesive layer, which is far away from the display panel, and the orthographic projection of the light shielding sheet on the display panel completely covers the orthographic projection of the through hole on the display panel; carrying out optical alignment on the circuit board and the display module so as to enable the central axis of the first light-transmitting hole to coincide with the central axis of the through hole; and attaching the circuit board to one side of the functional layer, which is far away from the display panel.
According to the manufacturing method of the display device, the light shielding sheet is arranged in the through hole in the functional layer, and the light shielding sheet can shield light rays, so that alignment light is shielded by the light shielding sheet and cannot irradiate the display panel in the process of optically aligning the circuit board and the display module, and the influence on the display effect of the display panel is avoided. In addition, the light-shielding sheet is attached to the light-transmitting glue layer, so that the light-shielding sheet is firmly fixed and can be conveniently moved out after the manufacturing is finished.
In one embodiment, the display device further includes a protective film for covering the first light-transmitting hole, and the method for manufacturing the display device further includes: optically aligning the protective film with the display module and the circuit board so that the orthographic projection of the protective film on the display module completely covers the orthographic projection of the first light-transmitting hole on the display module; the shading sheet is moved out of the through hole; the protective film is attached to one side, away from the display module, of the circuit board, wherein the orthographic projection of the protective film on the display module completely covers the orthographic projection of the first light-transmitting hole on the display module. In the process of carrying out optical alignment on the protective film, the display module and the circuit board, alignment light in the optical alignment process is shielded by the shading sheet and cannot irradiate the display panel, and the influence on the display effect of the display panel is avoided. And after the light shielding sheet is moved out of the through hole, a protective film used for covering the first light transmission hole is arranged in the display device, the through hole and the first light transmission hole can be isolated from the external environment, the protective effect is achieved on the through hole and the first light transmission hole, and external light can be prevented from irradiating the display panel.
In one embodiment, an insulating adhesive layer is disposed on a side of the circuit board away from the functional layer, a second light hole corresponding to the first light hole is disposed on the insulating adhesive layer, a central axis of the second light hole coincides with a central axis of the first light hole, and the step of attaching the protective film to a side of the circuit board away from the display module specifically includes: attaching the protective film to the insulating adhesive layer; wherein, the orthographic projection of protection film on display module assembly covers the orthographic projection of second light trap on display module assembly completely. The side of the circuit board, which deviates from the functional layer, is provided with the insulating glue layer, so that the circuit board can be conveniently attached to other components in the display device in the subsequent manufacturing process, in addition, the second light holes corresponding to the first light holes are arranged on the insulating glue layer, in the working process of the display device, the protective film is removed, light rays sequentially pass through the insulating glue layer through the second light holes, the circuit board is passed through the first light holes, after the functional layer is passed through the through holes, the light rays are irradiated onto the display panel through the light-transmitting glue layer, and the normal use of the display device is not influenced.
In one embodiment, the light shielding sheet has magnetism, and the step of removing the light shielding sheet from the through hole specifically includes: and the shading sheet is adsorbed and removed from the through hole by adopting a magnetic piece. The magnetic shading sheet is absorbed and moved out from the through hole by adopting the magnetic piece, and the operation is simple and convenient.
In one embodiment, the adhesive force between the light shielding sheet and the light-transmitting adhesive layer is smaller than the magnetic attraction force between the light shielding sheet and the magnetic member. Due to the design, when the magnetic shading sheet is adsorbed by the magnetic part, the shading sheet can be smoothly separated from the light-transmitting glue layer and cannot generate glue pulling, and the separation effect of the shading sheet is better.
In one embodiment, the light shield includes a ferromagnetic metal material. The ferromagnetic metal material is adopted to make the shading sheet have magnetism, so that the magnetism of the shading sheet is stronger, the structure of the shading sheet is simpler, and the manufacturing cost is lower.
In one embodiment, the surface of the light shielding sheet is provided with a light-transmission-preventing blackening coating. The surface through at the anti-dazzling screen sets up the black coating of anti-light tight, not only can strengthen the shading effect of anti-dazzling screen, can also play certain guard action to the anti-dazzling screen simultaneously, promotes its life.
In one embodiment, the functional layer includes at least one of a buffer layer, a support layer, a heat dissipation layer, and a shield layer. Due to the design, the functional layer can play at least one of a buffering function, a supporting function, a heat dissipation function and an electromagnetic shielding function on the display panel, and can be flexibly selected according to use requirements.
In one embodiment, the functional layer comprises a buffer layer, a supporting layer and a heat dissipation layer which are sequentially stacked on one side of the light-transmitting glue layer, which is far away from the display panel; the through hole penetrates through the buffer layer, the supporting layer and the heat dissipation layer to expose the light-transmitting glue layer. Through set up the through-hole that runs through on buffer layer, supporting layer and heat dissipation layer to show the printing opacity glue film, so, in display device's working process, required light of fingerprint identification sensor during operation can pass the functional layer by this through-hole, does not influence display device's normal use. And, also be convenient for set up the anti-dazzling screen in the through-hole and bond in printing opacity glue film for display module's structure is simpler.
In one embodiment, the light-shielding sheet has a thickness not greater than that of the buffer layer in a direction perpendicular to the display panel. Through making the thickness of anti-dazzling screen in the direction of perpendicular to display panel not more than the thickness of buffer layer for when attached in one side that the printing opacity glue film deviates from display panel with anti-dazzling screen, anti-dazzling screen all around is totally wrapped by the buffer layer, plays certain guard action to anti-dazzling screen, and simultaneously, anti-dazzling screen can not influence the use of functional layer yet.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:
FIG. 1 is a schematic cross-sectional view of a display module according to the related art;
fig. 2 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a method for manufacturing a display module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a circuit board and a display module assembly aligned according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a method for manufacturing a display module according to another embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of the protective film aligned with the display module and the circuit board according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a light shielding sheet according to an embodiment of the present application when the light shielding sheet is removed from the through hole;
fig. 8 is a schematic structural view illustrating a protective film attached to a circuit board according to an embodiment of the present disclosure.
The reference numbers in the detailed description are as follows:
10: a display module;
100: a display panel;
220: a light-transmitting adhesive layer;
300: functional layer, 310: through hole, 320: buffer layer, 330: support layer, 340: a heat dissipation layer;
400: a shading sheet;
20: circuit board, 21: a first light-transmitting hole;
30: a protective film;
40: insulating glue layer, 41: a second light-transmitting hole;
50: a magnetic member.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Fig. 1 is a schematic cross-sectional view of a display module 1 in the related art.
Referring to fig. 1, a display module 1 in the related art includes a display panel 11 and a supporting film 12 disposed on a backlight side of the display panel 11, wherein a through hole 13 is reserved in the supporting film 12 for light passing through when the fingerprint sensor operates. In the process of assembling and attaching the display module 1 and the circuit board 14, an optical alignment method is generally adopted to accurately align the display module 1 and the circuit board 14, for example, a Charge-coupled Device (CCD) is used to obtain optical image information of the display module 1 and the circuit board 14, and an optical image is converted into a digital signal to realize automatic detection, so that the display module 1 and the circuit board 14 need to be irradiated by light to facilitate detection of marks on the display module 1 and the circuit board 14. At this time, the alignment light may simultaneously pass through the through hole 13 on the supporting Film layer 12 and irradiate onto the display panel 11, and characteristic deviation of a Thin Film Transistor (TFT) may occur in the display panel 11 at the position of the light irradiation region, so that brightness of the display module 1 is not uniform, various traces occur, and the display effect of the display module 1 is seriously affected.
Fig. 2 is a schematic cross-sectional view illustrating the display module 10 according to an embodiment of the present disclosure.
In order to solve the above problem, referring to fig. 2, a display device in a manufacturing method of a display device according to an embodiment of the present application includes a display module 10 and a circuit board 20. The circuit board 20 is provided with a first light hole 21, the display module 10 includes a display panel 100, and a light-transmitting adhesive layer 200 and a functional layer 300 sequentially stacked on the backlight side of the display panel 100, and the functional layer 300 is provided with a through hole 310 capable of exposing the light-transmitting adhesive layer 200. The display device further comprises a light shielding sheet 400, wherein the light shielding sheet 400 can be arranged in the through hole 310 and bonded to the light-transmitting adhesive layer 200; and the orthographic projection of the light shielding sheet 400 on the display panel 100 completely covers the orthographic projection of the through hole 310 on the display panel 100.
The Display panel 100 is a portion of the Display module 10 for displaying image information, and includes, but is not limited to, an Organic light emitting semiconductor (OLED) panel. The display panel 100 has a light-emitting side and a backlight side opposite to the light-emitting side, the light-emitting side is a side in the light irradiation direction emitted by the display panel 100, the image information displayed in the display panel 100 can be observed facing the light-emitting side, and the backlight side is a side away from the light irradiation direction emitted by the display panel 100.
The light-transmitting adhesive layer 200 and the functional layer 300 can be used together to carry and support the display panel 100. The light-transmitting adhesive layer 200 is made of a light-transmitting material, such as EMBO grid adhesive, which has adhesive properties, and the light-transmitting adhesive layer 200 may be adhered to the backlight side of the display panel 100. The functional layer 300 is used to provide the display panel 100 with functions such as a buffering function, a supporting function, a heat dissipation function, and an electromagnetic shielding function, and therefore, the number of layers of the functional layer 300 and the material used therefor are flexibly set according to the required functions, and are not particularly limited herein. Functional layer 300 is last to be equipped with the through-hole 310 that can expose printing opacity glue film 200, and this through-hole 310 can supply the required light of fingerprint identification sensor during operation to pass through to printing opacity glue film 200 also can not shelter from light, so that display module assembly 10 in this embodiment can be with fingerprint identification sensor combination in order to have fingerprint identification function under the screen.
In order to avoid the alignment light irradiating the display panel 100 during the process of assembling and bonding the display module 10 and the circuit board 20, the display device in this embodiment further includes a light shielding sheet 400, and the light shielding sheet 400 can shield the light, so that the alignment light during optical alignment is shielded by the light shielding sheet 400 and cannot irradiate the display panel 100. The material for the light-shielding sheet 400 is not limited as long as it has a function of shielding light.
Fig. 3 is a flowchart of a manufacturing method of a display module according to an embodiment of the present application, and fig. 4 is a schematic structural diagram of a circuit board and a display module aligned according to an embodiment of the present application;
on the basis, referring to fig. 3 to 4, a method for manufacturing a display device according to an embodiment of the present application includes:
s102, disposing a light shielding sheet 400 in the through hole 310, wherein the light shielding sheet 400 is attached to a side of the transparent adhesive layer 200 away from the display panel 100, and an orthographic projection of the light shielding sheet 400 on the display panel 100 completely covers the orthographic projection of the through hole 310 on the display panel 100.
The light-shielding sheet 400 is disposed in the through hole 310 and bonded to the transparent adhesive layer 200, and the light-shielding sheet 400 is not separated from the through hole 310 under the bonding force of the transparent adhesive layer 200. In order to completely prevent alignment light from being irradiated to the display panel 100 from the through holes 310 on the functional layer 300 during optical alignment, the light shielding sheet 400 needs to completely cover the through holes 310 on the functional layer 300, so that the orthographic projection of the light shielding sheet 400 on the display panel 100 completely covers the orthographic projection of the through holes 310 on the display panel 100. The orthographic projection of the light-shielding sheet 400 on the display panel 100, i.e. the projection of the light-shielding sheet 400 on the display panel 100 in the direction perpendicular to the display panel 100 surface, is similar to the orthographic projection of the through hole 310 on the display panel 100, i.e. the projection of the through hole 310 on the display panel 100 in the direction perpendicular to the display panel 100 surface, so that the light-shielding sheet 400 can be ensured to completely cover the through hole 310 on the functional layer 300.
S104, optically aligning the circuit board 20 and the display module 10 to make the central axis of the first light hole 21 coincide with the central axis of the through hole 310.
The Circuit Board 20 can carry the display module 10, the Circuit Board 20 can adopt a Printed Circuit Board (PCB) or a Flexible Printed Circuit (FPC) or the like, the Circuit Board 20 is electrically connected to each component or assembly of the display module 10, and the first light hole 21 of the Circuit Board 20 is also used for passing light required by the fingerprint sensor during operation. As shown in fig. 4, the display module 10 and the circuit board 20 are precisely aligned by an optical alignment method, for example, a Charge-coupled Device (CCD) is used to obtain optical image information of the display module and the circuit board, and the optical image is converted into a digital signal for automatic detection. When the display module 10 and the circuit board 20 are irradiated by light, so that the marks on the display module and the circuit board are convenient to detect, the light shielding sheet 400 is arranged in the through hole 310 on the functional layer 300, the light shielding sheet 400 can shield the light, the alignment light sequentially passes through the circuit board 20 through the first light transmission hole 21, and is shielded by the light shielding sheet 400 after passing through the functional layer 300 through the through hole 310, and the light transmission glue layer 200 cannot be penetrated to irradiate the display panel 100.
And S106, attaching the circuit board 20 to the side of the functional layer 300, which is far away from the display panel 100.
And attaching the aligned circuit board 20 to the display module 10, and communicating the first light-transmitting hole 21 on the circuit board 20 with the through hole 310 in the display module 10 to complete the manufacture of the display device. In the manufacturing method of the display device, the light shielding sheet 400 is arranged in the through hole 310 on the functional layer 300, and the light shielding sheet 400 can shield light, so that alignment light is shielded by the light shielding sheet 400 and cannot irradiate the display panel 100 in the process of optically aligning the circuit board 20 and the display module 10, and the display effect of the display panel 100 is prevented from being affected. In addition, since the light-shielding sheet 400 is attached to the light-transmitting adhesive layer 200, the light-shielding sheet 400 is firmly fixed, and the light-shielding sheet 400 is convenient to remove after the manufacturing process is completed.
Fig. 5 is a flowchart of a manufacturing method of a display module according to another embodiment of the present disclosure, fig. 6 is a schematic structural diagram of a protective film provided in one embodiment of the present disclosure when the protective film is aligned with the display module and a circuit board, fig. 7 is a schematic structural diagram of a light-shielding sheet provided in one embodiment of the present disclosure when the light-shielding sheet is removed from a through hole, and fig. 8 is a schematic structural diagram of the protective film provided in one embodiment of the present disclosure when the protective film is attached to the circuit board.
After the display module 10 and the circuit board 20 are attached to each other, in order to prevent the through hole 310 and the first light hole 21 from being directly exposed to the outside, the protective film 30 for covering the light hole 21 may be further disposed in the display device, and the protective film 30 is opaque, so that the through hole 310 and the first light hole 21 are isolated from the external environment, thereby protecting the through hole 310 and the first light hole 21 and preventing the external light from irradiating the display panel 100.
On this basis, the method for manufacturing a display device provided in the embodiment of the present application further includes:
s108, optically aligning the protection film 30 with the display module 10 and the circuit board 20, so that the orthographic projection of the protection film 30 on the display module 10 completely covers the orthographic projection of the first light-transmitting hole 21 on the display module 10.
As shown in fig. 6, the orthographic projection of the protection film 30 on the display module 10 completely covers the orthographic projection of the first light hole 21 on the display module 10, the orthographic projection of the protection film 30 on the display module 10, that is, the projection of the protection film 30 on the surface of the display module 10 along the direction perpendicular to the surface of the display module 10, and the orthographic projection of the first light hole 21 on the display module 10, that is, the projection of the first light hole 21 on the surface of the display module 10 along the direction perpendicular to the surface of the display module 10, so that the protection film 30 can completely cover the first light hole 21, isolate the through hole 310 and the first light hole 21 from the external environment, and protect them.
S110, the light shielding sheet 400 is removed from the through hole 310.
Since the optical alignment process is completed, there is no alignment light at this time, and the protective film 30 can be used to block the light in the subsequent process, the light shielding sheet 400 can be removed from the through hole 310 as shown in fig. 7. For example, the light-shielding sheet 400 may be gripped by a gripping tool and the light-shielding sheet 300 may be moved out of the through-hole 310 in the axial direction of the through-hole 310.
S112, attaching the protection film 30 to a side of the circuit board 20 away from the display module 10, wherein an orthographic projection of the protection film 30 on the display module 10 completely covers the orthographic projection of the first light-transmitting hole 21 on the display module 10.
In the process of optically aligning the protective film 30 with the display module 10 and the substrate 20, the alignment light during the optical alignment is shielded by the light shielding sheet 300 and does not irradiate the display panel 100, thereby avoiding the influence on the display effect of the display panel 100. After the light shielding film 300 is removed from the through hole 221, referring to fig. 8, the protective film 30 for covering the first light transmission hole 21 is disposed in the display device, so as to isolate the through hole 310 and the first light transmission hole 21 from the external environment, protect them, and prevent the external light from irradiating the display panel 100.
After the protective film 30 is attached to the side of the circuit board 20 away from the display module 10, the display device is temporarily manufactured, and in the subsequent manufacturing process, if necessary, the protective film 30 can be removed from the circuit board 20, and the display device is further processed and manufactured. In order to facilitate the attachment of the circuit board 20 to other components in the display device in the subsequent manufacturing process, an insulating adhesive layer 40 is disposed on a side of the circuit board 20 away from the functional layer 300, a second light hole 41 corresponding to the first light hole 21 is disposed on the insulating adhesive layer 40, and a central axis of the second light hole 41 coincides with a central axis of the first light hole 21. The insulating glue layer 40 has adhesive properties, and by providing the insulating glue layer 40 on the side of the circuit board 20 facing away from the functional layer 300, the circuit board 20 can be attached to other components in the display device by means of the insulating glue layer 40.
At this time, the step of attaching the protection film 30 to the side of the circuit board 20 away from the display module 10, that is, the step S112 specifically includes: attaching the protective film 30 to the insulating glue layer 40; the orthographic projection of the protective film 30 on the display module 10 completely covers the orthographic projection of the second light-transmitting hole 41 on the display module 10.
The insulating adhesive layer 40 is provided with a second light hole 41 corresponding to the first light hole 21, in the working process of the display device, the protective film 30 is removed, light sequentially passes through the insulating adhesive layer 40 through the second light hole 41, passes through the circuit board 20 through the first light hole 21, passes through the functional layer 300 through the through hole 310, and then passes through the light-transmitting adhesive layer 200 to irradiate the display panel 100, so that the normal use of the display device is not affected.
In the process of removing the light-shielding sheet 400 from the through hole 310, the light-shielding sheet 400 may be clamped by means of a clamping tool, and the light-shielding sheet 300 may be removed from the through hole 310 along the axial direction of the through hole 310, and in order to make the removing operation simpler, in some embodiments, the light-shielding sheet 400 may optionally have magnetism. At this time, as shown in fig. 7, the step of moving the light shielding sheet 400 out of the through hole 310, that is, the step S110, specifically includes: the light shielding sheet 400 is absorbed and removed from the through hole 310 using the magnetic member 50. After the display module 10 and the circuit board 20 are attached, the magnetic member 50 is disposed between the circuit board 20 and the protective film 30, and the light shielding sheet 400 with magnetism is absorbed and removed from the through hole 310 by the magnetic member 50, so that the operation is simple and convenient. The magnetic member 50 and the light shielding sheet 400, which are attracted together, are then removed, and the protective film 30 and the circuit board 20 are attached.
When the magnetic shielding sheet 400 is removed from the through hole 310 by the magnetic member 50, the adhesive force between the light shielding sheet 400 and the transparent adhesive layer 200 is smaller than the magnetic attraction force between the light shielding sheet 400 and the magnetic member 50. Due to the design, when the magnetic shielding sheet 400 is adsorbed by the magnetic member 50, the shielding sheet 400 can be smoothly separated from the transparent adhesive layer 200 without generating adhesive pull, and the separation effect of the shielding sheet 400 is better.
Illustratively, the light-shielding sheet comprises a ferromagnetic metal material, i.e. the light-shielding sheet can be made of a ferromagnetic metal material. Ferromagnetism is a so-called spontaneous magnetization phenomenon in which some materials are magnetized by an external magnetic field and then remain magnetized even when the external magnetic field disappears. Ferromagnetic metals are a generic term for metals that have ferromagnetic properties, including but not limited to iron, cobalt, nickel, and the like.
In any of the above embodiments, the light-shielding sheet 400 can shield light, and it may be an integrated structure formed by a single material, that is, the surface of the light-shielding sheet 400 is provided with a light-shielding blackening coating, and the blackening coating can completely absorb all light irradiated onto the surface of the light-shielding sheet 400, and the light-shielding effect is better by providing the surface of the light-shielding sheet 400 with the light-shielding blackening coating. The light shield 400 may also be a composite structure formed by a combination of materials, for example, the light shield 400 includes a body and a light-transmission-preventing coating arranged in a stack. The body is a substrate layer of the light shielding sheet 400, and the light-transmitting-preventing coating is stacked on the body so that the light shielding sheet 400 has a function of shielding light. The structure of the light shielding sheet 400 is simpler due to the design, and the manufacturing and forming of the light shielding sheet are facilitated.
The light-blocking coating may be provided on a plurality of different surfaces of the body or may be provided on only one of the surfaces of the body. On the basis of the above embodiment, optionally, the light-transmitting-proof coating layer is formed on a side of the body away from the light-transmitting adhesive layer 200. One side of deviating from printing opacity glue film 200 through the body at anti-dazzling screen 400 forms and prevents the light transmission coating, just can satisfy anti-dazzling screen 400's user demand, has saved the quantity of preventing the light transmission coating, has reduced the cost of manufacture.
In some embodiments, the functional layer 300 optionally includes at least one of a buffer layer 320, a support layer 330, a heat dissipation layer 340, and a shielding layer (not shown in the figures). Such a design enables the functional layer 300 to perform at least one of a buffering function, a supporting function, a heat dissipation function, and an electromagnetic shielding function on the display panel 100, and can be flexibly selected according to the use requirement. The buffer layer 320 may be made of Foam (Foam), which is a material foamed by plastic particles, and has the characteristics of high elasticity, light weight, free bending, thin volume, reliable performance, etc., so that the buffer layer 320 can deform within a certain range when being impacted by the outside, thereby protecting the display panel 100. The supporting layer 330 may be made of Polyimide (PI, Polyimide), which is a polymer having an imide ring (-CO-N-CO-) in the main chain, is one of organic polymer materials with the best overall performance, has the characteristics of high temperature resistance, stable chemical properties, low expansion sparsity, excellent mechanical properties, and the like, and plays a role in supporting the display panel 100. The heat dissipation layer 340 can be made of copper foil, the copper foil is made of copper and other metals in a certain proportion, the surface oxygen property is low, the heat dissipation layer can be attached to various different base materials, the temperature use range is wide, and the heat conduction performance is good. The shielding layer may be made of a nickel-based metal material, and has the characteristics of excellent conductivity, moderate price, and the like, and helps the display panel 100 to dissipate heat.
For example, in some embodiments, optionally, as shown in fig. 2, the functional layer 300 includes a buffer layer 320, a support layer 330, and a heat dissipation layer 340 sequentially stacked on the side of the light-transmissive adhesive layer 200 facing away from the display panel 100; the through hole 310 penetrates the buffer layer 320, the support layer 330 and the heat dissipation layer 340 to expose the light-transmissive adhesive layer 200. In this way, in the operation process of the display device, the light required by the fingerprint identification sensor during operation can pass through the functional layer 300 through the through hole 310, and the normal use of the display device is not affected. In addition, the light shielding film 400 is conveniently disposed in the through hole 310 and bonded to the transparent adhesive layer 200, so that the structure of the display module 10 is simpler.
On the basis of the above embodiment, along the direction perpendicular to the display panel 100, the thickness of the light-shielding sheet 400 is not greater than the thickness of the buffer layer 320, so that when the light-shielding sheet 400 is attached to the side of the light-transmitting adhesive layer 200 departing from the display panel 100, the periphery of the light-shielding sheet 400 is completely covered by the buffer layer 320, a certain protection effect is exerted on the light-shielding sheet 400, and meanwhile, the light-shielding sheet 400 does not influence the use of the functional layer 300.
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 application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The manufacturing method of the display device comprises a display module and a circuit board, and is characterized in that a first light hole is formed in the circuit board, the display module comprises a display panel, and a light-transmitting glue layer and a functional layer which are sequentially arranged on the backlight side of the display panel in a stacked mode, a through hole capable of exposing the light-transmitting glue layer is formed in the functional layer, and the manufacturing method of the display device comprises the following steps:
arranging a light shielding sheet in the through hole, wherein the light shielding sheet is attached to one side of the light-transmitting adhesive layer, which is far away from the display panel, and the orthographic projection of the light shielding sheet on the display panel completely covers the orthographic projection of the through hole on the display panel;
carrying out optical alignment on the circuit board and the display module so as to enable the central axis of the first light-transmitting hole to be coincident with the central axis of the through hole;
and attaching the circuit board to one side of the functional layer, which is far away from the display panel.
2. The method of manufacturing a display device according to claim 1, further comprising a protective film for covering the first light-transmitting hole, wherein the method further comprises:
optically aligning the protective film with the display module and the circuit board so that the orthographic projection of the protective film on the display module completely covers the orthographic projection of the first light-transmitting hole on the display module;
removing the light shielding sheet from the through hole;
attaching the protective film to one side of the circuit board, which is far away from the display module; the orthographic projection of the protective film on the display module completely covers the orthographic projection of the first light-transmitting hole on the display module.
3. The method according to claim 2, wherein an insulating adhesive layer is disposed on a side of the circuit board away from the functional layer, a second light hole corresponding to the first light hole is disposed on the insulating adhesive layer, a central axis of the second light hole coincides with a central axis of the first light hole, and the step of attaching the protective film to a side of the circuit board away from the display module specifically includes:
attaching the protective film to the insulating adhesive layer; the orthographic projection of the protective film on the display module completely covers the orthographic projection of the second light-transmitting hole on the display module.
4. The method of claim 2, wherein the light shielding plate has magnetic properties, and the step of removing the light shielding plate from the through hole comprises:
and adsorbing and removing the shading sheet from the through hole by adopting a magnetic member.
5. The method of claim 4, wherein an adhesive force between the light shielding sheet and the light transmissive adhesive layer is smaller than a magnetic attraction force between the light shielding sheet and the magnetic member.
6. The method for manufacturing a display device according to claim 4, wherein the light shielding sheet comprises a ferromagnetic metal material.
7. The method for manufacturing a display device according to any one of claims 1 to 6, wherein a surface of the light-shielding sheet is provided with a light-transmitting-preventive blackening coating.
8. The method of manufacturing a display device according to any one of claims 1 to 6, wherein the functional layer includes at least one of a buffer layer, a support layer, a heat dissipation layer, and a shield layer.
9. The method for manufacturing the display device according to claim 8, wherein the functional layer comprises a buffer layer, a support layer and a heat dissipation layer which are sequentially stacked on one side of the light-transmitting adhesive layer, which is far away from the display panel;
the through hole penetrates through the buffer layer, the supporting layer and the heat dissipation layer to expose the light-transmitting adhesive layer.
10. The method of claim 9, wherein a thickness of the light shielding sheet is not greater than a thickness of the buffer layer in a direction perpendicular to the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111583834.6A CN114267711A (en) | 2021-12-22 | 2021-12-22 | Manufacturing method of display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111583834.6A CN114267711A (en) | 2021-12-22 | 2021-12-22 | Manufacturing method of display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171532A (en) * | 2022-07-05 | 2022-10-11 | Oppo广东移动通信有限公司 | Flexible screen and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171532A (en) * | 2022-07-05 | 2022-10-11 | Oppo广东移动通信有限公司 | Flexible screen and electronic equipment |
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