WO2024114136A1 - 屏幕组件组装结构及其组装方法、电子设备 - Google Patents
屏幕组件组装结构及其组装方法、电子设备 Download PDFInfo
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- WO2024114136A1 WO2024114136A1 PCT/CN2023/125004 CN2023125004W WO2024114136A1 WO 2024114136 A1 WO2024114136 A1 WO 2024114136A1 CN 2023125004 W CN2023125004 W CN 2023125004W WO 2024114136 A1 WO2024114136 A1 WO 2024114136A1
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- WO
- WIPO (PCT)
- Prior art keywords
- protective
- screen
- adhesive layer
- frame
- display screen
- Prior art date
Links
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
Definitions
- the present application relates to the field of electronic equipment, and in particular to a screen component assembly structure and an assembly method thereof, and electronic equipment.
- the screen-to-body ratio of a display screen depends largely on the packaging method of the display screen.
- the back of the display screen is usually bonded to the middle frame with adhesive, and a narrow gap is left between the side wall of the display screen and the inner wall of the middle frame.
- the narrow gap provides an assembly gap between the display screen and the middle frame, and the display screen is protected by means of the narrow gap to prevent the display screen from being damaged by the middle frame in risk scenarios such as collision and falling.
- the present application provides a screen component assembly structure and an assembly method thereof, and an electronic device.
- the screen component assembly structure has good protection effect on the basis of achieving a narrow frame, and can improve the reliability of the electronic device.
- the present application provides a screen assembly assembly structure, including a screen assembly, a middle frame and a protective adhesive layer;
- the middle frame includes a middle plate portion and a frame portion, wherein the frame portion is arranged around the periphery of the middle plate portion; the screen assembly is supported on the middle plate portion, a protective gap is provided between the side wall of the screen assembly and the frame portion, and a protective adhesive layer is filled in the protective gap;
- the protective adhesive layer is divided into a high modulus portion and a low modulus portion, and the high modulus portion is located on the side of the low modulus portion away from the middle plate portion.
- the screen assembly structure provided in the present application can achieve a narrow frame effect by setting the side wall of the screen assembly and the frame portion in the form of a protective seam, and there is no overlap between the screen assembly and the frame portion. On this basis, by filling the protective seam with a protective adhesive layer, the protective seam is blocked by the protective adhesive layer, and the protective adhesive layer is used to protect the entire machine.
- the protective adhesive layer can play a protective role and a buffering role at the same time, which can prevent foreign matter from entering the display screen and protect the working performance of the display screen.
- the protective adhesive layer can also provide a buffer between the frame portion of the middle frame and the side wall of the screen assembly to prevent the screen assembly from being damaged.
- the screen assembly includes a display screen and a protective cover plate, the display screen is connected to the middle plate portion, and the protective cover plate is located on a side of the display screen away from the middle plate portion;
- the high modulus portion extends from the side of the protection cover plate to the side of the display screen, and the low modulus portion covers at least a portion of the side of the display screen.
- the high modulus portion extends from the side of the protective cover plate to the side of the display screen, the high modulus portion is located on the side where the appearance surface of the screen assembly is located, and plays a bonding and protective role to protect the working performance of the display screen.
- the low modulus portion cover at least part of the side of the display screen, the impact force of the frame portion of the middle frame on the side wall of the display screen is absorbed by the buffering effect of the low modulus portion, and the display screen is protected from damage.
- one end of the side wall of the display screen facing the protective cover plate is located within the range covered by the low modulus portion.
- the low modulus portion By making the end of the side wall of the display screen facing the protective cover plate within the coverage of the low modulus portion, only the low modulus portion exists in the thickness area where the side of the display screen is located.
- the low modulus portion can more easily fill the gap between the display screen and the frame portion.
- the low modulus portion maximizes the buffer area on the side of the display screen, thereby providing better protection for the display screen.
- one end of the frame portion extending toward the side of the protective cover plate is its front end surface, and the protective adhesive layer extends from the front end surface toward the middle plate portion.
- the protective adhesive layer By making the top of the protective adhesive layer roughly flush with the front end surface of the frame, when applying the adhesive, the protective adhesive in a fluid state is located in the protective seam, and the support of the frame is conducive to the protective adhesive being cured and formed into a protective adhesive layer. In addition, after the protective adhesive is cured, the protective adhesive layer is almost entirely located in the shielding area of the frame, and the frame can protect the protective adhesive layer from being scratched or worn.
- a back adhesive layer is provided between the display screen and the middle plate portion.
- the display screen is an OLED display screen.
- a ground layer is provided on a side of the OLED display screen facing the middle plate portion, and the protective adhesive layer extends to contact the surface of the ground layer.
- the protective rubber layer By extending the protective rubber layer to contact the surface of the ground layer, the protective rubber layer conducts the protective cover and the ground layer, which can eliminate the static electricity charge adsorbed on the surface of the protective cover and solve problems such as green screen, uneven brightness, and screen flicker.
- the protective adhesive layer extends to be joined with an end surface of the back adhesive layer.
- the protective adhesive layer By extending the protective adhesive layer to join with the back adhesive layer, it can be ensured that the protective adhesive layer completely fills the protective gap, ensuring that the protective adhesive layer has good protective and buffering effects, and it can be ensured that the protective adhesive layer extends to the back of the OLED display screen so that the protective adhesive layer is in stable contact with the ground layer.
- the display screen is an LCD display screen.
- At least one side of the LCD display screen is connected to a circuit board, the circuit board is located in the protective seam, and the protective adhesive layer is supported on the circuit board.
- the modulus of the high modulus portion ranges from 40 MPa to 70 MPa, and the modulus of the low modulus portion ranges from 5 MPa to 35 MPa.
- the high modulus part of the protective adhesive layer By controlling the modulus range of the high modulus part of the protective adhesive layer between 40Mpa-70Mpa, the high modulus part has a higher hardness, which can ensure that the screen assembly and the frame are tightly and firmly connected, thereby improving the protective effect.
- the modulus range of the low modulus part of the protective adhesive layer between 5Mpa-35Mpa, the low modulus part has sufficient elastic deformation performance, which can ensure that the gap is completely filled and protect the display screen from damage.
- the protective adhesive layer is an adhesive layer formed by curing the first curing method and the second curing method.
- the protective adhesive layer is cured by two different curing methods, the first curing method and the second curing method, and can be
- the protective adhesive layer has a high modulus portion and a low modulus portion with different moduli, so that the protective adhesive layer plays both a bonding and fixing role and a buffering role.
- the first curing method is a light curing method
- the second curing method is a moisture curing method
- the portion of the protective adhesive layer close to the protective cover plate is formed into a high modulus portion through light curing and moisture curing, and the portion of the protective adhesive layer close to the middle plate portion of the middle frame is formed into a low modulus portion through moisture curing.
- the depth of the high modulus portion ranges from 0.4 mm to 0.6 mm.
- the present application provides a screen assembly assembly method, comprising:
- the protective adhesive is cured to form a protective adhesive layer; wherein the protective adhesive layer has a high modulus portion and a low modulus portion, and the high modulus portion is located on a side of the low modulus portion away from the middle plate portion of the middle frame.
- the screen assembly assembly method provided in the present application can coat protective glue on the frame portion of the middle frame, and through the extrusion of the screen assembly, the protective glue layer can be tightly connected between the screen assembly and the frame portion, and then the protective glue is cured to form a protective glue layer.
- the protective glue layer can play a protective role and a buffering role at the same time, which can prevent foreign objects from entering the display screen and protect the working performance of the display screen.
- the protective glue layer can also provide a buffer between the frame portion of the middle frame and the side wall of the screen assembly to prevent the screen assembly from being damaged.
- curing the protective adhesive includes:
- the protective adhesive is cured by a first curing method and a second curing method, so that the protective adhesive layer forms a high modulus portion and a low modulus portion.
- the formed protective adhesive layer can have a high modulus portion and a low modulus portion with different moduli, so that the protective adhesive layer can play both a bonding and fixing role and a buffering role.
- the first curing method is a light curing method
- the second curing method is a moisture curing method
- curing the protective adhesive includes:
- the protective adhesive is allowed to react with air to cure the protective adhesive by moisture curing.
- the protective glue will react with water molecules in the air to undergo moisture curing.
- the portion of the protective glue layer close to the protective cover plate forms a high modulus portion through light curing and moisture curing, and the portion of the protective glue layer close to the middle plate of the middle frame forms a low modulus portion through moisture curing.
- coating protective glue on the frame portion of the middle frame includes:
- the middle frame is tilted at a preset angle so that the inner side wall of the frame portion is tilted toward the spraying direction of the protective glue; wherein the inner side wall of the frame portion is a side wall surface of the frame portion facing the middle plate portion of the middle frame.
- the inner side wall of the frame is inclined toward the spraying direction of the protective glue, and the inner side wall of the frame has a larger area for receiving the protective glue.
- the inclined inner side wall of the frame can prevent the protective glue from flowing along its surface, which can make the protective glue
- the protective glue is stably attached to the inner side wall of the frame portion, and the front end surface of the frame portion is also covered with protective glue of sufficient thickness, so that the protective glue can stably cover the frame portion.
- the method before curing the protective adhesive, the method further includes:
- the present application provides an electronic device, comprising a back cover and the screen assembly structure as described above, wherein the back cover is connected to the middle frame, and the back cover is located on a side of the middle frame facing away from the screen assembly.
- the electronic device provided by the present application includes a screen component assembly structure and a back cover.
- the screen component assembly structure can achieve a narrow frame effect by setting the side wall of the screen component and the frame portion in the form of a protective seam, and there is no overlap between the screen component and the frame portion. On this basis, by filling the protective seam with a protective adhesive layer, the protective seam is blocked by the protective adhesive layer, and the protective adhesive layer is used to protect the entire machine.
- the protective adhesive layer can play a protective role and a buffering role at the same time, which can prevent foreign matter from entering the display screen and protect the working performance of the display screen.
- the protective adhesive layer can also provide a buffer between the frame portion of the middle frame and the side wall of the screen assembly to prevent the screen assembly from being damaged.
- FIG1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
- FIG2 is an exploded view of the electronic device shown in FIG1 ;
- FIG3 is a schematic diagram of a structure in which a screen assembly is assembled on a middle frame in the related art
- FIG4 is a schematic diagram of another structure of a screen assembly assembled on a middle frame in the related art
- FIG5 is a schematic diagram of a structure in which a third screen assembly is assembled on a middle frame in the related art
- FIG6 is a schematic diagram of a structure in which a fourth screen assembly is assembled on a middle frame in the related art
- FIG. 7 is a schematic diagram of the layered structure of the glue between the screen assembly and the frame portion in FIG. 6( a );
- FIG8 is a schematic structural diagram of a screen assembly structure provided in an embodiment of the present application.
- FIG9 is a schematic structural diagram of another screen assembly structure provided in an embodiment of the present application.
- FIG10 is a flowchart of the steps of the assembly method provided in an embodiment of the present application.
- FIG11 is a process flow chart of a screen assembly structure provided in an embodiment of the present application.
- FIG. 12 is a process flow chart of another screen assembly structure provided in an embodiment of the present application.
- the embodiment of the present application provides an electronic device, which can be a consumer electronic product.
- the electronic device includes but is not limited to a mobile phone, a tablet computer (portable android device, PAD), a notebook computer (NoteBook Computer, referred to as: NoteBook), an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a walkie-talkie, a netbook, a POS (Point of sales) machine, a personal digital assistant (personal digital assistant, PDA), a wearable device, a virtual reality (virtual reality, VR) device, an augmented reality (augmented reality, AR) device, etc.
- a virtual reality virtual reality
- AR augmented reality
- FIG1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
- the electronic device 1 may include a screen assembly 100 and a housing 200.
- One side surface of the screen assembly 100 is used to display image information, and the side surface of the screen assembly 100 is usually defined as its front side, and the other side surface opposite to its front side is its back side.
- the housing 200 is arranged around the side and back of the screen assembly 100 to support and fix the screen assembly 100 and provide protection.
- the front side of the screen assembly 100 is exposed outside the housing 200 for the user to view the content displayed by the screen assembly 100 or to perform input operations on the electronic device 1.
- the side surface where the screen assembly 100 is located is defined as the front surface of the electronic device 1
- the other side surface of the electronic device 1 opposite to the front surface is defined as the back surface thereof.
- the "front surface” of a component refers to the side surface of the component facing the front surface of the electronic device 1
- the "back surface” of a component refers to the side surface of the component facing the back surface of the electronic device 1.
- FIG2 is an exploded view of the electronic device shown in FIG1 .
- the housing 200 of the electronic device 1 may include a middle frame 210 and a back cover 220, wherein the middle frame 210 is connected between the screen assembly 100 and the back cover 220, the screen assembly 100 is supported on the front of the middle frame 210, and the back cover 220 is connected to the back of the middle frame 210.
- the screen assembly 100 is usually supported on the middle frame 210 as a whole to ensure the strength and stability of the screen assembly 100 and meet the use requirements of the screen assembly 100.
- the back cover 220 is usually connected and fixed to the middle frame 210 in an overlapping manner, and a storage space is enclosed between the middle frame 210 and the back cover 220, and the storage space is used to set circuit boards 130, batteries, camera modules, microphones and other devices.
- the middle frame 210 may include a middle plate portion 211 and a frame portion 212.
- the middle plate portion 211 is located between the screen assembly 100 and the back cover 220 and is arranged parallel to the screen assembly 100 and the back cover 220.
- the frame portion 212 is arranged around the periphery of the middle plate portion 211.
- the frame portion 212 is usually perpendicular to the plate surface of the middle plate portion 211 and extends to both sides of the middle plate portion 211.
- the screen assembly 100 and the back cover 220 may be located in the area surrounded by the frame portion 212.
- the frame portion 212 and the middle plate portion 211 may be an integrally formed structure.
- the screen assembly 100 is usually connected to the middle plate 211 in an integrally fitted manner, and the middle plate 211 supports the screen assembly 100, which can ensure that the screen assembly 100 is supported stably and firmly, so that the screen assembly 100 has sufficient strength to meet the use requirements of the screen assembly 100 being frequently pressed.
- the frame 212 is arranged around the side of the screen assembly 100 to protect the edge of the screen assembly 100, helping the screen assembly 100 to resist risk scenarios such as collision and falling, and protecting the screen assembly 100 from damage.
- the side of the frame portion 212 of the middle frame 210 facing the back cover 220 is usually provided with an overlapping edge, and the back cover 220 is overlapped and fixedly connected to the overlapping edge of the frame portion 212.
- the back cover 220 can be bonded to the overlapping edge of the frame portion 212 by adhesive.
- the support structures are usually provided between the middle plate portion 211 of the middle frame 210 and the back cover 220.
- the support structures are supported between the middle plate 211 and the rear cover 220 to enhance the strength of the rear cover 220 to prevent the rear cover 220 from being deformed by force.
- the support structures can also be used as positioning structures or mounting structures for the devices in the accommodating space.
- FIG3 is a schematic diagram of a screen assembly assembled on a middle frame in the related art
- FIG4 is a schematic diagram of another screen assembly assembled on a middle frame in the related art.
- the screen assembly 101 equipped with an OLED (Organic Light-Emitting Diode) display screen is used as an example for explanation, that is, the screen assembly 101 may include an OLED display screen 1011a and a cover plate 1012 covering the OLED display screen 1011a.
- OLED Organic Light-Emitting Diode
- the screen-to-body ratio of the screen assembly 101 is generally determined by the width of the cover plate 1012 extending beyond the OLED display screen 1011a (the width between the two vertical dotted lines shown in FIG. 3 and FIG. 4 ).
- the greater the width of the cover plate 1012 extending beyond the OLED display screen 1011a the greater the width of the black border of the screen assembly 101, the wider the frame of the screen assembly 101, and the lower the screen-to-body ratio
- the smaller the width of the cover plate 1012 extending beyond the OLED display screen 1011a the smaller the width of the black mark of the screen assembly 101, the narrower the frame of the screen assembly 101, and the higher the screen-to-body ratio.
- the screen assembly 101 in order to achieve the effect of a narrow frame, the screen assembly 101 is only bonded to the middle plate portion 1021 of the middle frame 102 through the adhesive layer 103, and the width of the cover plate 1012 extending outside the OLED display screen 1011a is very small, and there is no overlap between the cover plate 1012 and the frame portion 1022 of the middle frame 102.
- the black border width d of the screen assembly 101 is very small, and the screen assembly 101 can achieve a narrow frame effect, a high screen-to-body ratio, and a good appearance.
- the OLED display screen 1011a is at risk of shaking and has poor stability. Moreover, during long-term use, dust is easily accumulated in the gap and external water vapor easily enters the OLED display screen 1011a through the gap, which is prone to protection problems, such as causing the OLED display screen 1011a to have problems such as broken bright spots, liquid ingress, and electrostatic breakdown.
- a step surface 1022a is further provided on the frame portion 1022 of the middle frame 102, the portion of the cover plate 1012 extending outside the OLED display screen 1011a is overlapped on the step surface 1022a of the frame portion 1022, and an adhesive layer 104 is provided between the cover plate 1012 and the step surface 1022a of the frame portion 1022, the cover plate 1012 and the frame portion 1022 are bonded and connected through the adhesive layer 104, the adhesive layer 104 fills the gap between the screen assembly 101 and the frame portion 1022 of the middle frame 102, and the adhesive layer 104 is used to protect the whole machine, so that foreign matter such as dust and water vapor from the outside can be prevented from entering the OLED display screen 1011a, and the reliability of the whole machine is high.
- the width of the cover plate 1012 extending out of the OLED display screen 1011a is relatively large to ensure that there is a sufficient overlap area between the cover plate 1012 and the step surface 1022a of the frame portion 1022.
- this increases the width of the black border of the screen assembly 101.
- the black border width d of the screen assembly 101 is relatively large, and the narrow frame effect of the screen assembly 101 cannot be achieved.
- the screen ratio of the screen assembly 101 is low, and the appearance effect is not good.
- FIG5 is a schematic diagram of a structure in which a third screen assembly is assembled on a middle frame in the related art
- FIG6 is a schematic diagram of a structure in which a fourth screen assembly is assembled on a middle frame in the related art.
- the screen assembly 101 is illustrated as an example in which a liquid crystal display (LCD) screen is mounted on the screen assembly 101. That is, the screen assembly 101 may include an LCD screen 1011b and a cover plate 1012 covering the LCD screen 1011b.
- LCD liquid crystal display
- an annular step surface 1022a surrounding the frame portion 1022 can also be provided on the frame portion 1022 of the middle frame 102, and the side edges of the cover plate 1012 are overlapped on the step surface 1022a of the frame portion 1022.
- the cover plate 1012 is connected to the step surface 1022a of the frame portion 1022 through the adhesive layer 104, and the whole device is protected by the adhesive layer 104.
- the width of the cover plate 1012 extending out of the LCD display screen 1011b is large, and the black border width d of the screen component 101 is large, and the narrow frame effect of the screen component 101 cannot be achieved.
- a narrow frame connection method is adopted for at least part of the side edges of the screen assembly 101.
- the width of the cover plate 1012 extending out of the LCD display screen 1011b is very small, and there is no overlap between the cover plate 1012 and the frame portion 1022 of the middle frame 102, so that the corresponding side edges of the screen assembly 101 achieve a narrow frame effect.
- the other side edges of the screen assembly 101 for example, the bottom edge of the screen assembly 101, still use a cover plate 1012 overlapped on the step surface 1022a of the frame portion 1022, and bonded to the frame portion 1022 through an adhesive layer 104.
- the LCD display screen 1011b is different from the OLED display screen 1011a in that the LCD display screen 1011b is a liquid crystal box structure, which includes two substrates and liquid crystal molecules sandwiched between the two substrates. Therefore, the packaging requirements of the LCD display screen 1011b are relatively high.
- the LCD display screen 1011b is provided with a frame sealant between the two substrates.
- side sealants 105 may also be provided on part of the side walls of the LCD display screen 1011b. The side sealants 105 are used to seal the side walls of the LCD display screen 1011b to prevent the LCD display screen 1011b from leaking.
- the sides of the screen assembly 101 that are not overlapped with the frame portion 1022 are usually sealed by filling the gap between the screen assembly 101 and the frame portion 1022 with glue 106.
- the gap can be first filled with low-modulus supporting glue 1061, which plays a supporting and buffering role, and then filled with filler glue 1062 on the supporting glue 1061, which plays a role in protecting the appearance.
- the supporting glue 1061 is likely to overflow to the appearance surface of the screen assembly 101.
- there is a layering defect between the supporting glue 1061 and the filling glue 1062 with different moduli and there is a gap between the interface between the supporting glue 1061 and the filling glue 1062, which can easily cause the electronic device 1 to have problems such as orange peel appearance, liquid ingress, and electrostatic breakdown.
- the embodiment of the present application improves the assembly structure between the screen assembly 100 and the middle frame 210.
- the present embodiment defines the overall structure of the screen assembly 100 assembled in the middle frame 210 as the screen assembly 100 assembly structure.
- the screen assembly 100 assembly structure of the present embodiment by setting a protective adhesive layer 400 in the protective seam between the screen assembly 100 and the frame portion 1022 of the middle frame 210, while achieving a narrow frame, the protective adhesive layer 400 is used to protect the entire machine.
- the protective adhesive layer 400 can not only play a role in filling the appearance but also play a role in buffering, which can improve the protection effect of the entire machine.
- FIG8 is a schematic diagram of a screen assembly structure provided in an embodiment of the present application.
- the screen assembly 100 is bonded to the middle plate portion 211 of the middle frame 210 through the adhesive layer 300.
- the adhesive material constituting the adhesive layer 300 is, for example, a pressure-sensitive adhesive.
- the material constituting the adhesive layer 300 may include acrylic resin, silicone resin, Silicone rubber, polyurethane resin, etc.
- the adhesive layer 300 used in the electronic device 1 the adhesive layer 300 may have high temperature resistance and aging resistance to meet the long-term use requirements of electronic products.
- the screen assembly 100 includes a display screen 110 and a protective cover plate 120 which are stacked.
- the display screen 110 is located on one side of the middle plate portion 211 of the screen assembly 100 close to the middle frame 210.
- the front of the display screen 110 is used to display image information, and the back of the display screen 110 is bonded to the middle plate portion 211 through the adhesive layer 300.
- the protective cover plate 120 is located on the side of the display screen 110 away from the middle plate portion 211.
- the protective cover plate 120 is covered on the front of the display screen 110.
- the protective cover plate 120 is used to protect the display screen 110, prevent the display screen 110 from being damaged by scratches or bumps, and ensure the normal operation of the display screen 110.
- the protective cover plate 120 is usually made of a relatively high-strength, transparent material. On the basis of ensuring that the protective cover plate 120 has sufficient strength to protect the display screen 110, the protective cover plate 120 is prevented from affecting the display effect of the display screen 110.
- the protective cover 120 can be a glass cover or a PET (Polyethylene terephthalate) cover.
- the protective cover 120 and the display screen 110 may be connected by optically clear adhesive (OCA).
- OCA optically clear adhesive
- an optical adhesive layer (not shown in the figure) may be provided between the protective cover 120 and the display screen 110.
- the optical adhesive layer has high transparency, a light transmittance of more than 99%, high adhesion, and high temperature resistance and UV resistance. It can ensure that the protective cover 120 and the display screen 110 are firmly connected.
- the optical adhesive layer can also increase the brightness and contrast of the display screen 110, and enhance the display effect of the screen assembly 100.
- the end of the border portion 212 of the middle frame 210 extending to the side of the protective cover 120 is defined as its front end face.
- the matching structure between the middle frame 210 and the back cover 220 is not shown.
- the border portion 212 of the middle frame 210 may also have a portion extending to one side of the back cover 220, and the end of the border portion 212 extending to the side of the back cover 220 is its rear end face.
- the screen assembly 100 and the frame portion 212 of the middle frame 210 are non-overlapping, and there is a protective seam (not shown in the figure) between the side wall of the screen assembly 100 and the frame portion 212.
- the protective seam provides an assembly gap between the screen assembly 100 and the middle frame 210, so that the area of the area enclosed by the frame portion 212 of the middle frame 210 is slightly larger than the area of the screen assembly 100, so that the screen assembly 100 can be smoothly mounted on the middle plate portion 211 of the middle frame 210;
- the protective seam provides basic protection for the screen assembly 100, preventing the frame portion 212 of the middle frame 210 from directly contacting the side wall of the screen assembly 100, so as to prevent the frame portion 212 from hard contacting the screen assembly 100 and causing damage to the screen assembly 100, for example, it can prevent the screen assembly 100 from being worn or having local broken bright spots.
- the protection cover 120 and the frame portion 212 of the middle frame 210 do not need to be overlapped and bonded, therefore, while ensuring that the protection cover 120 can completely cover the display screen 110 and fully protect the display screen 110, the width of the protection cover 120 extending outside the display screen 110 (to the side of the display screen 110) can be very small, the black border width of the screen assembly 100 is very small, the screen assembly 100 has a narrow frame and a high screen-to-body ratio, which can meet the narrow frame requirements of the electronic device 1 and enhance the appearance of the electronic device 1.
- a protective adhesive layer 400 is further filled in the protective gap between the side wall of the screen assembly 100 and the frame portion 212.
- the protective gap is sealed by the protective adhesive layer 400, and the electronic device 1 is protected by the protective adhesive layer 400 to prevent foreign matter such as dust, water vapor, grease, etc. from entering the display screen 110 through the protective gap, thereby protecting the working performance of the display screen 110 and preventing problems such as liquid ingress and electrostatic breakdown from occurring in the display screen 110.
- the protective adhesive layer 400 may extend from the front end surface of the frame portion 212 of the middle frame 210 to the middle plate portion 211, that is, the top end of the protective adhesive layer 400 (the end of the protective adhesive layer 400 facing the appearance surface of the screen assembly 100) may be substantially flush with the front end surface of the frame portion 212.
- a protective glue layer 400 is formed in the protective seam.
- the protective glue overflowing on the front end face of the frame portion 212 is wiped off with the front end face of the frame portion 212 as the interface, and the protective glue in the protective seam is retained, supported by the frame portion 212, so as to facilitate the curing and molding of the protective glue.
- the protective glue layer 400 is almost entirely located in the shielding area of the frame portion 212.
- the frame portion 212 can protect the protective glue layer 400 from being scratched or worn, which is conducive to protecting the integrity of the protective glue layer 400.
- the protective glue layer 400 has good stability, which can extend the service life of the protective glue layer 400.
- the protective adhesive layer 400 can be divided into a high modulus portion 410 and a low modulus portion 420, the high modulus portion 410 is close to the front of the screen assembly 100, and the low modulus portion 420 is located on the side of the high modulus portion 410 facing the middle plate portion 211, or it can be said that the high modulus portion 410 is located on the side of the low modulus portion 420 away from the middle plate portion 211.
- the high modulus portion 410 has a higher modulus and a higher hardness
- the low modulus portion 420 has a lower modulus and a better elasticity.
- the high modulus portion 410 and the low modulus portion 420 of the protective adhesive layer 400 can simultaneously play a protective role and a buffering role, which can prevent foreign objects from entering the display screen 110 and protect the working performance of the display screen 110. At the same time, it can also provide a buffer between the frame portion 212 of the middle frame 210 and the side wall of the screen assembly 100 to prevent the screen assembly 100 from being damaged.
- the high modulus portion 410 extends from the side where the front of the screen assembly 100 is located to the middle plate portion 211 of the middle frame 210, that is, the high modulus portion 410 is located on the side where the appearance surface of the screen assembly 100 is located, and the high modulus portion 410 extends from the side of the protective cover plate 120 to the side of the display screen 110.
- the high modulus portion 410 has a high modulus and high hardness, and can play a good bonding role.
- the high modulus portion 410 enables the protective adhesive layer 400 to block the protective seam for a long time and stably, preventing foreign matter such as dust, water vapor, grease, etc. from entering the display screen 110, thereby protecting the working performance of the display screen 110.
- the protective rubber layer 400 mainly plays a role in protecting the whole machine through the high modulus part 410, which can ensure that the protective rubber layer 400 is not worn or scratched.
- the high modulus part 410 can also ensure that the protective rubber layer 400 will not deform, crack or other adverse phenomena, thereby ensuring that the protective rubber layer 400 maintains a long-term and effective protection effect for the whole machine and extending the service life of the protective rubber layer 400.
- the low modulus portion 420 is located between the high modulus portion 410 and the middle plate portion 211 of the middle frame 210.
- the modulus of the low modulus portion 420 is low, the hardness of the low modulus portion 420 is low, the elasticity is good, and it can produce elastic deformation.
- the expansion coefficient of the low modulus portion 420 provides a stable guarantee for the protective rubber layer 400 to fill the protective seam, and provides a support basis for the high modulus portion 410.
- the low modulus portion 420 is mainly set to correspond to the area where the side of the display screen 110 is located. The gap between the side of the display screen 110 and the frame portion 212 is filled by the low modulus portion 420.
- the elastic performance of the low modulus portion 420 can play a good buffering role, avoiding hard contact between the frame portion 212 and the display screen 110, and protecting the display screen 110 from damage. Especially in risk scenarios such as collision or falling, the low modulus portion 420 can absorb the impact force to prevent the display screen 110 from defects such as wear, broken bright spots, and gaps.
- the protective adhesive layer 400 has a high modulus portion 410 and a low modulus portion 420, it is still an integral adhesive layer.
- the protective adhesive layer 400 of this embodiment has good integrity, no stratification within the adhesive layer, and no gaps at the stratified interface, which will not cause orange peel appearance, liquid ingress and electrostatic breakdown.
- the extension depth of the high modulus portion 410 of the protective adhesive layer 400 there are both high modulus portions 410 and low modulus portions 420 in the thickness region where the side of the display screen 110 is located.
- the bottom side of the high modulus portion 410 extending toward the middle plate portion 211 of the middle frame 210 is higher than the plane where the back side of the protective cover plate 120 (the side surface of the protective cover plate 120 facing the display screen 110) is located; or, there may be only the low modulus portion 420 in the thickness region where the side of the display screen 110 is located.
- the high modulus portion 410 extends toward the middle plate portion 211 of the middle frame 210.
- the bottom side of the middle plate portion 211 is lower than the plane where the front side of the display screen 110 (the side surface of the display screen 110 facing the cover plate) is located.
- at least part of the thickness area where the side of the display screen 110 is located is covered by the low modulus portion 420, so that the display screen 110 is protected from damage through the buffering effect of the low modulus portion 420.
- the extension depth of the high modulus portion 410 of the protective adhesive layer 400 can be controlled so that the side end where the front of the display screen 110 is located is located within the range covered by the low modulus portion 420.
- the end of the side wall of the display screen 110 facing the protective cover plate 120 is located within the range covered by the low modulus portion 420.
- the low modulus portion 420 exists in the thickness region where the side of the display screen 110 is located.
- the seam width between the side wall of the display screen 110 and the frame portion 212 of the middle frame 210 is slightly larger than the seam width between the protective cover plate 120 and the frame portion 212.
- the protective adhesive layer 400 can better absorb impact force and provide better protection for the display screen 110 .
- the bottom side of the high modulus portion 410 of the protective adhesive layer 400 can be controlled to be approximately located at the interface between the protective cover plate 120 and the display screen 110, that is, in the protective adhesive layer 400, the high modulus portion 410 and the low modulus portion 420 are approximately bounded by the interface between the protective cover plate 120 and the display screen 110.
- the protective adhesive layer 400 extending from the top end of the frame portion 212 toward the middle plate portion 211, it can be ensured that the high modulus portion 410 has a sufficient extension depth to meet the bonding strength requirements and protection requirements of the protective adhesive layer 400, and the low modulus portion 420 can also maximize the coverage of the side wall of the display screen 110, ensuring the sealing effect of the protective adhesive layer 400 and the buffering protection effect on the display screen 110.
- the protective adhesive layer 400 is an integral adhesive layer, and the interface referred to here is not an interface with stratification that can be observed by the naked eye.
- the depth range of the high modulus portion 410 of the protective adhesive layer 400 can be controlled between 0.4 mm and 0.6 mm by adjusting the curing parameters of the protective adhesive layer 400.
- the protective adhesive layer 400 can have a high modulus portion 410 of sufficient depth, and the bonding strength of the protective adhesive layer 400 is high, which can meet the connection strength requirements between the screen assembly 100 and the frame portion 212 of the middle frame 210, and can play an effective protective role to prevent foreign matter such as dust, water vapor and grease in the external environment from entering the display screen 110; at the same time, the protective adhesive layer 400 has a sufficient depth in the area below the high modulus portion 410 to form a low modulus portion 420, which can meet the filling requirements and play a good buffering and protective role for the display screen 110.
- the depth of the high modulus portion 410 of the protective rubber layer 400 may be 0.42 mm, 0.44 mm, 0.46 mm, 0.48 mm, 0.50 mm, 0.52 mm, 0.54 mm, 0.56 mm, 0.58 mm, etc.
- the modulus of the high modulus portion 410 of the protective adhesive layer 400 can be in the range of 40Mpa-70Mpa, so that the high modulus portion 410 has a higher hardness.
- the high modulus portion 410 enables the protective adhesive layer 400 to have sufficient bonding strength, and the screen assembly 100 and the frame portion 212 of the middle frame 210 are tightly and firmly connected, thereby achieving a better protective effect.
- the modulus of the high modulus portion 410 of the protective adhesive layer 400 can be 45Mpa, 50Mpa, 55Mpa, 60Mpa, 65Mpa, etc.
- the modulus of the low modulus portion 420 of the protective adhesive layer 400 may be in the range of 5Mpa-35Mpa, so that the low modulus portion 420 has sufficient elastic deformation performance, the low modulus portion 420 can fill the gap completely and make the protective adhesive layer 400 have a good buffering effect, absorb the impact of the frame portion 212 of the middle frame 210 on the display screen 110, and protect the display screen 110 from damage.
- the modulus of the low modulus portion 420 of the protective adhesive layer 400 may be in the range of 5Mpa-25Mpa, for example, the modulus of the low modulus portion 420 may be 8Mpa, 10Mpa, 12Mpa, 15Mpa, 18Mpa, 20Mpa, 22Mpa, etc.
- the viscosity of the protective glue constituting the protective glue layer 400 can be 20000-100000 cps, so that the protective glue has sufficient stability. After the adhesive is applied, the protective glue can be stably attached to the frame portion 212 of the middle frame 210, ensuring that the protective glue layer 400 can connect the screen assembly 100 and the frame portion 212 tightly and securely.
- the viscosity of the protective glue layer 400 can be 30000cps, 40000cps, 50000cps, 60000cps, 70000cps, 80000cps, 90000cps, etc.
- the thixotropy value of the protective glue constituting the protective glue layer 400 may be greater than 2. It should be noted that the thixotropy of the protective glue refers to the property that the shear stress of the protective glue 400a decreases over time under a certain shear rate, specifically: under agitation, the viscosity of the protective glue decreases rapidly, making it easier to coat; when stopped, the viscosity of the protective glue increases immediately and does not flow at will.
- the protective glue can be smoothly coated on the frame portion 212 of the middle frame 210 under the action of an external force, and after coating, the protective glue can stably stay on the frame portion 212.
- the elongation at break of the cured protective adhesive layer 400 can be greater than 300%, so that the protective adhesive layer 400 has good toughness on the basis of sufficient bonding strength. Even in risk scenarios such as collision and falling, the protective adhesive layer 400 will not easily break and delaminate, so that the protective adhesive layer 400 can maintain good protective performance for a long time.
- the protective adhesive layer 400 may be an adhesive layer formed by co-curing by a first curing method and a second curing method.
- the protective adhesive layer 400 is formed by curing by two different curing methods, so that the protective adhesive layer 400 has a high modulus portion 410 and a low modulus portion 420 with different moduli, so that the protective adhesive layer 400 can play both a bonding and fixing role and a buffering role.
- the main resin of the protective glue constituting the protective glue layer 400 may be composed of a light-curing resin and a moisture-curing resin.
- the protective glue layer 400 may be formed by curing by light curing and moisture curing.
- the aforementioned first curing method may be a light curing method, such as a UV (Ultraviolet Rays) light curing method.
- the aforementioned second curing method may be a moisture curing method.
- moisture curing is the reaction of the protective glue with moisture (water molecules) in the air to cure.
- a light source (such as a UV light source) is arranged on the side of the protective glue facing the protective cover plate 120, and the protective glue is irradiated with the light source 3, so that the portion of the protective glue close to the protective cover plate 120 is photocured and moisture cured to form a high modulus portion 410, while the portion of the protective glue close to the middle plate portion 211 of the middle frame 210 is far away from the light source, and this portion is only moisture cured to form a low modulus portion 420.
- a light source such as a UV light source
- the components of the protective glue constituting the protective glue layer 400 may include: UV moisture dual-cure resin (mass fraction accounting for 10-50%), UV moisture dual-cure monomer (mass fraction accounting for 5-40%), polyurethane prepolymer (mass fraction accounting for 2-10%), photoinitiator (mass fraction accounting for 0.5-5%), silane coupling agent (mass fraction accounting for 0.5-5%), moisture curing catalyst (mass fraction accounting for 0.5-5%), rheology modifier (mass fraction accounting for 0.5-5%), pigment (mass fraction accounting for 0.5-5%), etc.
- the UV moisture dual-curing resin can be a resin containing an isocyanate group and a free radical polymerizable group
- the UV moisture dual-curing monomer can be a monomer compound or a mixture containing an isocyanate group and a free radical polymerizable group
- the polyurethane prepolymer can be a compound whose terminal group is an isocyanate group when the polyol reacts with the isocyanate curing agent
- the photoinitiator can include at least one of benzophenone-based compounds, acetophenone-based compounds, acylphosphine oxide-based compounds, titanocene-based compounds, oxime ester-based compounds, benzoin ether-based compounds, and thioxanthone
- the silane coupling agent can include at least one of an amino coupling agent containing methoxysilicon or ethoxysilicon with a hydrolyzable functional group, an epoxy silane coupling agent, a mercaptosilane coupling
- the display screen 110 carried by the screen assembly 100 is taken as an example of an OLED display screen 110.
- the back of the OLED display screen 110 is bonded to the middle plate portion 211 of the middle frame 210 through the back adhesive layer 300.
- the width of the protective cover 120 extending out of the side of the OLED display screen 110 is very narrow.
- the protective adhesive layer 400 is filled between the protective cover 120 and the OLED display screen.
- the protective adhesive layer 400 plays a role in filling the gap, so that the screen assembly 100 has a narrow frame effect, and the buffering effect of the protective adhesive layer 400 can protect the OLED display 110 from damage.
- a grounding layer (not shown in the figure) is provided on one side of the middle plate portion 211 of the OLED display screen 110 facing the middle frame 210.
- the material constituting the grounding layer is, for example, copper foil.
- the grounding layer can play an electromagnetic shielding and antistatic role to improve the working performance of the electronic device 1.
- the protective adhesive layer 400 filled between the screen assembly 100 and the frame portion 212 of the middle frame 210 can extend to the back of the OLED display screen 110 and contact the surface of the grounding layer on the back of the OLED display screen 110.
- the protective adhesive layer 400 usually has conductive properties.
- the protective adhesive layer 400 is connected between the protective cover plate 120 and the ground layer.
- the electrostatic charge attached to the surface of the protective cover plate 120 can be conducted to the ground layer, thereby eliminating the harm caused by the electrostatic charge to the screen assembly 100.
- the OLED display screen 110 generally relies on thin film transistors to drive pixel circuits.
- Thin film transistors are, for example, LTPS (Low Temperature Poly-silicon) thin film transistors.
- Static electricity can cause the leakage current of the thin film transistor to increase, resulting in problems such as being unable to turn off pixels and insufficient charging time.
- there will be green screens due to the increase in the leakage current of the thin film transistor, the green pixel with the lowest turn-on voltage is always bright), uneven brightness, screen flickering, etc.
- the protective cover plate 120 and the grounding layer of the OLED display screen 110 are connected by the protective adhesive layer 400, which can eliminate static electricity and solve the problems of green screens, uneven brightness, screen flickering, etc.
- the amount of adhesive applied can be controlled.
- the protective adhesive layer 400 can be extended to join with the end face of the back adhesive layer 300 under the extrusion of the screen assembly 100.
- it can ensure that the protective adhesive layer 400 completely fills the protective gap between the screen assembly 100 and the frame portion 212 of the middle frame 210, ensuring that the protective adhesive layer 400 has good protection and buffering effects; on the other hand, in actual applications, there is usually a certain distance between the edge of the back adhesive layer 300 and the edge of the OLED display screen 110.
- the protective adhesive layer 400 By joining the protective adhesive layer 400 with the back adhesive layer 300, it can be ensured that the protective adhesive layer 400 extends to the back of the OLED display screen 110, so that the protective adhesive layer 400 is in stable contact with the grounding layer on the back of the OLED display screen 110.
- FIG9 is a schematic diagram of another screen assembly structure provided by an embodiment of the present application.
- the screen assembly 100 is provided with an LCD display screen 110b as an example for explanation. Similar to the aforementioned OLED display screen 110, the back of the LCD display screen 110b is bonded to the middle plate portion 211 of the middle frame 210 through a back adhesive layer 300. The width of the protective cover plate 120 extending out of the side of the LCD display screen 110b is very narrow.
- the protective adhesive layer 400 is filled in the protective seam formed between the protective cover plate 120 and the LCD display screen 110b and the frame portion 212 of the middle frame 210.
- the protective adhesive layer 400 plays a role in filling the appearance, so that the screen assembly 100 has a narrow frame effect, and the buffering effect of the protective adhesive layer 400 can protect the LCD display screen 110b from damage.
- the structures of several sides (such as the top side, the left side and the right side) of the screen assembly 100 equipped with the LCD display screen 110b are similar to the structure of the screen assembly 100 equipped with the OLED display screen 110.
- the protective adhesive layer 400 is filled between the side wall of the screen assembly 100 and the frame portion 212 of the middle frame 210. Since the grounding layer of the OLED display screen 110 does not exist on the side where the back of the LCD display screen 110b is located, the protective adhesive layer 400 can be extended to the back of the LCD display screen 110b by controlling the amount of adhesive applied.
- the protective adhesive layer 400 can be filled only in the protective seam, and there can be a gap between the protective adhesive layer 400 and the middle plate portion 211 of the middle frame 210.
- FIG. 9 (b) shows a case where a circuit board 130 is provided on the side of the LCD display screen 110b.
- the circuit board 130 may be a circuit board 130 that drives the thin film transistor of the LCD display screen 110b to work; in other embodiments, the circuit board 130 may be a circuit board 130 that delivers current to a backlight source (not shown in the figure).
- the LCD display screen 110b needs to be equipped with a backlight source to provide illumination, and the backlight source may be arranged on the side (one side or both sides) of the LCD display screen 110b, for example, the backlight source may be arranged on the bottom side of the LCD display screen 110b, and the backlight source may be, for example, a lamp bead arranged on the circuit board 130.
- the circuit board 130 can be an FPC (Flexible Printed Circuit board, flexible circuit board 130) as shown in the figure, or the circuit board 130 can also be a PCB (Printed Circuit Board, printed circuit board 130).
- the circuit board 130 can be mounted on the inner side wall of the frame portion 212 of the middle frame 210 (the side wall of the frame portion 212 facing the middle plate portion 211), for example, the inner side wall of the frame portion 212 of the middle frame 210 shown in the figure is provided with a positioning groove 2121, and the positioning groove 2121 can be used to accommodate and position the circuit board 130.
- the protective rubber layer 400 filled in the protective gap can be supported on the circuit board 130.
- the protective rubber layer 400 can extend downward from a position roughly flush with the front end surface of the frame portion 212 to be supported on the circuit board 130.
- the protective rubber layer 400 can cover the side space of the protective cover 120 and part of the space on the side of the LCD display screen 110b.
- the embodiment of the present application also provides a screen assembly 100 assembly method (hereinafter referred to as the assembly method), which is used to assemble and form the aforementioned screen assembly 100 assembly structure 10.
- the assembly method is described in detail below.
- Figure 10 is a step flow chart of the assembly method provided in an embodiment of the present application
- Figure 11 is a process flow chart of a screen component assembly structure provided in an embodiment of the present application
- Figure 12 is a process flow chart of another screen component assembly structure provided in an embodiment of the present application.
- the assembly method comprises the following steps:
- FIG11 takes the screen assembly 100 equipped with an OLED display screen 110a as an example, and shows the state structure of the screen assembly 100 at different stages during the process of being assembled on the middle frame 210.
- a protective glue 400a in a fluid state is applied to the frame portion 212 of the middle frame 210, so that the protective glue 400a mainly covers the front end surface and the inner side wall (the side wall of the frame portion 212 facing the middle plate portion 211) of the frame portion 212.
- the middle frame 210 can be tilted at a preset angle.
- the nozzle 2 for spraying the protective glue 400a can be located above the frame portion 212 of the middle frame 210, so that the inner wall of the frame portion 212 is tilted toward the spraying direction of the protective glue 400a.
- the area of the inner wall of the frame portion 212 that receives the protective glue 400a is larger, and the tilted inner wall of the frame portion 212 can hinder the protective glue 400a from flowing along its surface, so that the protective glue 400a can be stabilized on the inner wall of the frame portion 212, and the front end surface of the frame portion 212 is also covered with a sufficient thickness of the protective glue 400a, so that the protective glue 400a can be stably covered on the frame portion 212.
- the aforementioned preset angle i.e., the inclination angle of the middle frame 210
- the angle between the middle plate portion 211 of the middle frame 210 and the horizontal plane may be between 0 and 45°.
- the angle between the middle plate portion 211 of the middle frame 210 and the horizontal plane may be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, etc.
- a five-axis dispensing machine can be used to apply the protective glue 400a.
- the five-axis dispensing machine also includes two rotation axes, which can complete the spatial curve trajectory and can almost ensure that the protective glue 400a can be applied from any angle.
- Workpiece Compared with the traditional vertical downward dispensing/coating, the five-axis dispensing machine has a tighter and more solid gluing process, can dispense glue in a narrow area and avoid collision, and the nozzle 2 can adjust the tilt angle in real time to meet the dispensing/coating requirements of different areas and shapes on the workpiece, and can also reduce manual intervention, with a high degree of automation.
- the screen assembly 100 is then installed on the middle frame 210 .
- a layer of adhesive layer 300 is previously applied to the middle plate portion 211 of the middle frame 210 (or the screen assembly 100 ).
- the screen assembly 100 is bonded to the middle plate portion 211 of the middle frame 210 through the adhesive layer 300 .
- the side wall of the screen assembly 100 squeezes the protective glue 400a so that the protective glue layer 400 formed by subsequent curing can tightly connect the screen assembly 100 and the frame portion 212 of the middle frame 210 , ensuring that the protective glue layer 400 can play a sufficient protective role.
- the protective cover plate 120 and the display screen 110 may be assembled together in advance.
- the protective cover plate 120 and the display screen 110 may be connected together by the aforementioned optical adhesive.
- the amount of protective glue 400a applied to the frame portion 212 of the middle frame 210 is usually required to be greater than the amount of glue actually required to fill the protective gap, so as to ensure that the protective glue 400a can completely fill the protective gap and tightly connect the screen assembly 100 and the frame portion 212.
- the screen assembly 100 squeezes out the excess protective glue 400a, and the excess protective glue 400a overflows on the front end surface of the frame portion 212.
- the frame portion 212 can support the protective glue 400a to position it, which is beneficial to the curing of the protective glue 400a.
- the protective glue layer 400 is located in the shielding area of the frame portion 212, and the frame portion 212 can protect the protective glue layer 400 from being scratched or worn.
- this embodiment takes the case where the protective glue 400a is first applied on the frame portion 212 of the middle frame 210, and then the screen assembly 100 is installed on the middle frame 210 as an example. In this way, it can be ensured that the amount of protective glue 400a applied is sufficient, and through the extrusion of the screen assembly 100, it can be ensured that the protective glue 400a is tightly filled between the screen assembly 100 and the frame portion 212.
- the screen assembly 100 can also be first installed on the middle plate portion 211 of the middle frame 210, and a protective gap is first formed between the screen assembly 100 and the frame portion 212 of the middle frame 210, and then the protective glue 400a is applied to the protective gap, and the protective glue 400a completely fills the gap width of the protective gap through the fluidity of the protective glue 400a, and this embodiment does not limit this.
- the protective glue layer 400 formed by curing has a high modulus portion 410 and a low modulus portion 420.
- the high modulus portion 410 is close to the front of the screen assembly 100, and the low modulus portion 420 is located on the side of the high modulus portion 410 facing the middle plate portion 211. In other words, the high modulus portion 410 is located on the side of the low modulus portion 420 away from the middle plate portion 211.
- the high modulus portion 410 has a higher modulus and higher hardness, while the low modulus portion 420 has a lower modulus and better elasticity.
- the high modulus portion 410 and the low modulus portion 420 of the protective adhesive layer 400 can simultaneously play a protective role and a buffering role, which can prevent foreign matter from entering the display screen 110 and protect the working performance of the display screen 110. At the same time, it can also provide a buffer between the frame portion 212 of the middle frame 210 and the side wall of the screen assembly 100 to prevent the screen assembly 100 from being damaged.
- the modulus of the high modulus portion 410 may be in the range of 40 MPa to 70 MPa, and the modulus of the low modulus portion 410 may be in the range of 40 MPa to 70 MPa.
- the modulus range of the modulus portion 420 may be 5 MPa-35 MPa, which will not be described in detail.
- the protective adhesive layer 400 can be formed by co-curing through two different curing methods, namely a first curing method and a second curing method.
- the protective adhesive 400a can be cured by the first curing method and the second curing method so that the formed protective adhesive layer 400 has a high modulus portion 410 and a low modulus portion 420.
- the first curing method may be a light curing method, such as the UV light curing method described above, and the second curing method may be a moisture curing method.
- the main resin constituting the protective glue 400a may be composed of a light curing resin and a moisture curing resin.
- the components of the protective glue 400a may also include polyurethane prepolymers, photoinitiators, silane coupling agents, moisture curing catalysts, rheology modifiers, pigments, etc., which will not be described in detail.
- a light source 3 (such as a UV light source) is arranged on the side of the protective glue 400a facing the protective cover plate 120, and the protective glue 400a is irradiated with the light source 3, so that the part of the protective glue 400a close to the protective cover plate 120 is cured by light and moisture to form a high modulus portion 410, while the part of the protective glue 400a close to the middle plate portion 211 of the middle frame 210 is far away from the light source 3, and this part is only cured by moisture to form a low modulus portion 420.
- the protective glue 400a as a whole reacts with water molecules in the air to be cured, and this curing method is a moisture curing method.
- Figure 11 takes the display screen 110 carried by the screen assembly 100 as an OLED display screen 110a as an example.
- a grounding layer (not shown in the figure) is provided on the back of the OLED display screen 110a
- the amount of glue can be appropriately increased when applying the protective glue 400a.
- the protective glue 400a is squeezed to extend it to the back of the OLED display screen 110a, so that the protective glue 400a connects the protective cover plate 120 and the grounding layer on the back of the OLED display screen 110a to eliminate electrostatic charge and solve problems such as green screen, uneven brightness, and screen flicker.
- Figure 12 takes the display screen 110 carried by the screen assembly 100 as an LCD display screen 110b as an example for explanation.
- the process flow of assembling the screen assembly 100 equipped with the LCD display screen 110b on the middle frame 210 is similar to the process flow of assembling the screen assembly 100 equipped with the OLED display screen 110a on the middle frame 210, and will not be repeated here.
- the side structures of the screen assembly 100 equipped with the LCD display 110 b there are several sides that are similar to the structure of the screen assembly 100 equipped with the OLED display 110 a , for example, the top side, left side and right side of the screen assembly 100 equipped with the LCD display 110 b . Since there is no grounding layer on the back of the LCD display 110 b , when applying glue, the amount of glue on these sides can be controlled to be similar to the amount of glue on the screen assembly 100 equipped with the OLED display 110 a , so that the protective glue layer 400 extends to the back of the LCD display 110 b . Alternatively, as shown in FIG. 12( a ), the amount of glue applied on these sides can be appropriately reduced so that the protective glue layer 400 is only filled in the protective seam, and there is a gap between the protective glue layer 400 and the middle plate portion 211 of the middle frame 210 .
- the formed protective adhesive layer 400 can be supported on the circuit board 130, and the protective adhesive layer 400 can cover the side space of the protective cover plate 120 and part of the side space of the LCD display screen 110 b. Therefore, when applying the adhesive, the amount of adhesive applied on this side can be reduced accordingly to avoid excessive adhesive overflow after the screen assembly 100 is installed on the middle frame 210, thereby wasting the protective adhesive 400 a.
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Abstract
屏幕组件组装结构(10)及其组装方法、电子设备(1),该屏幕组件组装结构(10)通过将屏幕组件(100)的侧壁与边框部(212)之间设置为防护缝的形式,屏幕组件(100)与边框部(212)之间无搭接,可实现窄边框效果。在此基础上,通过在防护缝内填充防护胶层(400),封堵防护缝,利用防护胶层(400)进行整机防护。其中,通过使防护胶层(400)具有高模量部(410)和低模量部(420),且高模量部(410)位于低模量部(420)背离中框(210)的中板部(211)的一侧,高模量部(410)的模量较高、硬度高,低模量部(420)的模量较低、弹性好,可使得防护胶层(400)同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏(110)内,保护显示屏(110)的工作性能,同时,也能够在中框(210)的边框部(212)与屏幕组件(100)的侧壁之间提供缓冲,防止屏幕组件(100)受到损伤。
Description
本申请要求于2022年11月28日提交中国国家知识产权局、申请号为202211502488.9、申请名称为“屏幕组件组装结构及其组装方法、电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及电子设备领域,特别涉及一种屏幕组件组装结构及其组装方法、电子设备。
随着技术的进步,电子设备(例如手机)的显示屏越来越追求极致的窄边框化,以实现更大的屏占比。
显示屏的屏占比很大程度上取决于显示屏的封装方式,为了使电子设备的屏占比更高,目前,通常利用背胶将显示屏的背面粘接在中框上,显示屏的侧壁与中框的内侧壁之间留有窄缝,该窄缝提供了显示屏和中框之间的装配间隙,并且,借助该窄缝对显示屏进行防护,以免在碰撞、跌落等风险场景下,显示屏被中框碰撞而受损。
然而,由于显示屏与中框之间存在窄缝,窄缝内容易堆积灰尘,长期使用过程中存在防护失效的风险。
发明内容
本申请提供一种屏幕组件组装结构及其组装方法、电子设备,屏幕组件组装结构在实现窄边框化的基础上,防护效果好,可提升电子设备的可靠性。
第一方面,本申请提供一种屏幕组件组装结构,包括屏幕组件、中框和防护胶层;
中框包括中板部和边框部,边框部围设在中板部的周侧;屏幕组件支撑在中板部上,屏幕组件的侧壁与边框部之间具有防护缝,防护胶层填充在防护缝内;
其中,沿屏幕组件的厚度方向,防护胶层分为高模量部和低模量部,高模量部位于低模量部背离中板部的一侧。
本申请提供的屏幕组件组装结构,通过将屏幕组件的侧壁与边框部之间设置为防护缝的形式,屏幕组件与边框部之间无搭接,可实现窄边框效果。在此基础上,通过在防护缝内填充防护胶层,防护胶层封堵防护缝,利用防护胶层进行整机防护。其中,通过使防护胶层具有高模量部和低模量部,且高模量部位于低模量部背离中框的中板部的一侧,高模量部的模量较高、硬度高,低模量部的模量较低、弹性好,可使得防护胶层同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏内,保护显示屏的工作性能,同时,也能够在中框的边框部与屏幕组件的侧壁之间提供缓冲,防止屏幕组件受到损伤。
在一种可能的实施方式中,屏幕组件包括显示屏和保护盖板,显示屏连接在中板部上,保护盖板位于显示屏背离中板部的一侧;
高模量部由保护盖板的侧方向显示屏的侧方延伸,低模量部覆盖显示屏的侧方的至少部分区域。
通过使高模量部由保护盖板的测方向显示屏的侧方延伸,高模量部位于屏幕组件的外观面所在的一侧,起到粘接作用和防护作用,保护显示屏的工作性能。通过使低模量部覆盖显示屏的侧方的至少部分区域,利用低模量部的缓冲作用,吸收中框的边框部对显示屏的侧壁的冲击力,保护显示屏不受损伤。
在一种可能的实施方式中,显示屏的侧壁朝向保护盖板的一端位于低模量部覆盖的范围内。
通过使显示屏的侧壁朝向保护盖板的一端位于低模量部覆盖的范围内,显示屏的侧方所在的厚度区域内只存在低模量部,低模量部更容易填充显示屏与边框部之间的缝隙,并且,低模量部实现了显示屏的侧方的缓冲区域最大化,对显示屏的防护效果更佳。
在一种可能的实施方式中,边框部伸向保护盖板的侧方的一端为其前端面,防护胶层由前端面向中板部延伸。
通过使防护胶层的顶端大致与边框部的前端面平齐,施胶时,流体状态的防护胶均位于防护缝内,边框部的支撑作用有利于防护胶固化成型为防护胶层。并且,防护胶固化成型后,防护胶层几乎全部位于边框部的遮挡区域内,边框部可保护防护胶层不被刮擦、磨损。
在一种可能的实施方式中,显示屏与中板部之间设置有背胶层。
在一种可能的实施方式中,显示屏为OLED显示屏。
在一种可能的实施方式中,OLED显示屏朝向中板部的一侧设有接地层,防护胶层延伸至与接地层的表面接触。
通过使防护胶层延伸至与接地层的表面接触,防护胶层导通保护盖板和接地层,能够消除保护盖板表面吸附的静电电荷,解决绿屏、亮度不均、屏闪等问题。
在一种可能的实施方式中,防护胶层延伸至与背胶层的端面接合。
通过使防护胶层延伸至与背胶层接合,可确保防护胶层将防护缝填充完全,保证防护胶层具有良好的防护和缓冲作用,并且,可确保防护胶层延伸至OLED显示屏的背面,以使防护胶层与接地层稳定接触。
在一种可能的实施方式中,显示屏为LCD显示屏。
在一种可能的实施方式中,LCD显示屏的至少一侧连接有电路板,电路板位于防护缝内,防护胶层支撑在电路板上。
在一种可能的实施方式中,高模量部的模量范围为40Mpa-70Mpa,低模量部的模量范围为5Mpa-35Mpa。
通过将防护胶层的高模量部的模量范围控制在40Mpa-70Mpa之间,使得高模量部具有较高的硬度,高模量部可确保屏幕组件和边框部链接紧密、牢靠,提升防护效果。通过将防护胶层的低模量部的模量范围控制在5Mpa-35Mpa之间,使得低模量部具有足够的弹性形变性能,低模量部可确保填缝完全并保护显示屏不受损伤。
在一种可能的实施方式中,防护胶层为经第一固化方式和第二固化方式共同固化形成的胶层。
防护胶层经过第一固化方式和第二固化方式两种不同的固化方式共同固化成型,可以
使得防护胶层具有模量不同的高模量部和低模量部,以使防护胶层同时起到粘接固定作用和缓冲作用。
在一种可能的实施方式中,第一固化方式为光固化方式,第二固化方式为湿气固化方式。
防护胶层靠近保护盖板的部分经由光固化方式和湿气固化方式共同形成高模量部,防护胶层靠近中框的中板部的部分经由湿气固化方式形成低模量部。
在一种可能的实施方式中,沿屏幕组件的厚度方向,高模量部的深度范围为0.4mm-0.6mm。
第二方面,本申请提供一种屏幕组件组装方法,包括:
在中框的边框部上涂覆防护胶;
将屏幕组件安装在中框上,屏幕组件的侧壁挤压防护胶;
固化防护胶,形成防护胶层;其中,防护胶层具有高模量部和低模量部,高模量部位于低模量部背离中框的中板部的一侧。
本申请提供的屏幕组件组装方法,通过在中框的边框部上涂覆防护胶,通过屏幕组件的挤压作用,可使防护胶层紧密的连接在屏幕组件和边框部之间,之后,通过对防护胶进行固化形成防护胶层。其中,通过使形成的防护胶层具有高模量部和低模量部,且高模量部位于低模量部背离中框的中板部的一侧,高模量部的模量较高、硬度高,低模量部的模量较低、弹性好,可使得防护胶层同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏内,保护显示屏的工作性能,同时,也能够在中框的边框部与屏幕组件的侧壁之间提供缓冲,防止屏幕组件受到损伤。
在一种可能的实施方式中,固化防护胶,包括:
采用第一固化方式和第二固化方式对防护胶进行固化,以使防护胶层形成高模量部和低模量部。
通过采用第一固化方式和第二固化方式两种不同的固化方式共同对防护胶进行固化,可以使得形成的防护胶层具有模量不同的高模量部和低模量部,以使防护胶层同时起到粘接固定作用和缓冲作用。
在一种可能的实施方式中,第一固化方式为光固化方式,第二固化方式为湿气固化方式,固化防护胶,包括:
在背离中板部的一侧对防护胶进行光照,以通过光固化方式对防护胶进行固化;
使防护胶与空气发生反应,以通过湿气固化方式对防护胶进行固化。
防护胶在固化过程中,会与空气中的水分子发生反应而进行湿气固化,同时,通过在背离中板部的一侧对防护胶进行光照,使防护胶层靠近保护盖板的部分经由光固化方式和湿气固化方式共同形成高模量部,防护胶层靠近中框的中板部的部分经由湿气固化方式形成低模量部。
在一种可能的实施方式中,在中框的边框部上涂覆防护胶,包括:
将中框以预设角度倾斜放置,使边框部的内侧壁朝向防护胶的喷射方向倾斜;其中,边框部的内侧壁为边框部朝向中框的中板部的一侧壁面。
通过将中框倾斜放置,使边框部的内侧壁朝向防护胶的喷射方向倾斜,边框部的内侧壁上承接防护胶的面积更大,倾斜的边框部的内侧壁可阻碍防护胶沿其表面流动,能够使
防护胶稳定在边框部的内侧壁上,并且,边框部的前端面也覆盖有足够厚度的防护胶,可以使防护胶稳定的覆盖在边框部上。
在一种可能的实施方式中,固化防护胶之前,还包括:
擦除溢出在边框部的前端面之上的防护胶,使防护胶的表面与边框部的前端面平齐。
第三方面,本申请提供一种电子设备,包括后盖和如前所述的屏幕组件组装结构,后盖与中框连接,且后盖位于中框背离屏幕组件的一侧。
本申请提供的电子设备,包括屏幕组件组装结构和后盖,屏幕组件组装结构通过将屏幕组件的侧壁与边框部之间设置为防护缝的形式,屏幕组件与边框部之间无搭接,可实现窄边框效果。在此基础上,通过在防护缝内填充防护胶层,防护胶层封堵防护缝,利用防护胶层进行整机防护。其中,通过使防护胶层具有高模量部和低模量部,且高模量部位于低模量部背离中框的中板部的一侧,高模量部的模量较高、硬度高,低模量部的模量较低、弹性好,可使得防护胶层同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏内,保护显示屏的工作性能,同时,也能够在中框的边框部与屏幕组件的侧壁之间提供缓冲,防止屏幕组件受到损伤。
图1为本申请实施例提供的一种电子设备的结构示意图;
图2为图1所示的电子设备的***图;
图3为相关技术中一种屏幕组件组装于中框的结构示意图;
图4为相关技术中另一种屏幕组件组装于中框的结构示意图;
图5为相关技术中第三种屏幕组件组装于中框的结构示意图;
图6为相关技术中第四种屏幕组件组装于中框的结构示意图;
图7为图6(a)中屏幕组件与边框部之间的胶水的分层结构的示意图;
图8为本申请实施例提供的一种屏幕组件组装结构的结构示意图;
图9为本申请实施例提供的另一种屏幕组件组装结构的结构示意图;
图10为本申请实施例提供的组装方法的步骤流程图;
图11为本申请实施例提供的一种屏幕组件组装结构的工艺流程图;
图12为本申请实施例提供的另一种屏幕组件组装结构的工艺流程图。
附图标记说明:
1-电子设备;10-屏幕组件组装结构;2-喷头;3-光源;
100-屏幕组件;200-外壳;300-背胶层;400-防护胶层;400a-防护胶;
110-显示屏;120-保护盖板;130-电路板;210-中框;220-后盖;410-高模量部;420-
低模量部;
110a-OLED显示屏;110b-LCD显示屏;211-中板部;212-边框部;
2121-定位槽;
101-屏幕组件;102-中框;103-背胶层;104-粘胶层;105-侧封胶;106-胶水;
1011a-OLED显示屏;1011b-LCD显示屏;1012-盖板;1021-中板部;1022-边框部;
1022a-台阶面;1061-支撑胶;1062-填缝胶。
1-电子设备;10-屏幕组件组装结构;2-喷头;3-光源;
100-屏幕组件;200-外壳;300-背胶层;400-防护胶层;400a-防护胶;
110-显示屏;120-保护盖板;130-电路板;210-中框;220-后盖;410-高模量部;420-
低模量部;
110a-OLED显示屏;110b-LCD显示屏;211-中板部;212-边框部;
2121-定位槽;
101-屏幕组件;102-中框;103-背胶层;104-粘胶层;105-侧封胶;106-胶水;
1011a-OLED显示屏;1011b-LCD显示屏;1012-盖板;1021-中板部;1022-边框部;
1022a-台阶面;1061-支撑胶;1062-填缝胶。
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释,而非旨在限定本申请。
本申请实施例提供一种电子设备,电子设备可以为消费类电子产品。示例性的,电子设备包括但不限于为手机、平板电脑(portable android device,PAD)、笔记本电脑(NoteBook Computer,简称为:NoteBook)、超级移动个人计算机(ultra-mobile personal computer,UMPC)、对讲机、上网本、POS(Point of sales)机、个人数字助理(personal digital assistant,PDA)、可穿戴设备、虚拟现实(virtual reality,VR)设备、增强现实(augmented reality,AR)设备等。
图1为本申请实施例提供的一种电子设备的结构示意图。参照图1所示,以电子设备1为手机为例,电子设备1可以包括屏幕组件100和外壳200。屏幕组件100的一侧表面用于显示图像信息,通常将屏幕组件100的该侧表面定义为其正面,与其正面相背的另一侧表面为其背面。外壳200围设在屏幕组件100的周侧和背面,用于对屏幕组件100进行支撑固定,并提供保护。屏幕组件100的正面暴露在外壳200之外,以供用户观看屏幕组件100显示的内容或对电子设备1进行输入操作。
通常,屏幕组件100所在的一侧表面被定义为电子设备1的正面,电子设备1的与其正面相背的另一侧表面定义为其背面。以下描述电子设备1的各部件时,与电子设备1的正面和背面相对应的,部件的“正面”是指部件朝向电子设备1的正面的一侧表面,部件的“背面”是指部件朝向电子设备1的背面的一侧表面。
图2为图1所示的电子设备的***图。参照图2所示,电子设备1的外壳200可以包括中框210和后盖220,中框210连接在屏幕组件100和后盖220之间,屏幕组件100支撑在中框210的正面,后盖220连接在中框210的背面。其中,屏幕组件100通常是整体支撑在中框210上,以保证屏幕组件100的强度和稳定性,满足屏幕组件100的使用要求。后盖220通常采用搭接的方式与中框210连接固定,中框210和后盖220之间围成容纳空间,容纳空间内用于设置电路板130、电池、摄像模组、麦克风等器件。
中框210可以包括中板部211和边框部212,中板部211位于屏幕组件100和后盖220之间,且与屏幕组件100及后盖220平行设置,边框部212围设在中板部211的周侧,边框部212通常垂直于中板部211的板面向中板部211的两侧延伸,屏幕组件100和后盖220均可以位于边框部212围成的区域内。示例性的,边框部212和中板部211可以为一体成型结构。
屏幕组件100通常采用整体贴合的方式,连接在中板部211上,依靠中板部211对屏幕组件100进行支撑,可保证将屏幕组件100支撑平稳、牢靠,使屏幕组件100具有足够的强度,满足屏幕组件100被频繁按压的使用要求。边框部212围设在屏幕组件100的周侧,对屏幕组件100的边缘形成保护,帮助屏幕组件100对抗碰撞、跌落等风险场景,保护屏幕组件100不受损伤。
中框210的边框部212朝向后盖220的一侧通常设置有搭接沿,后盖220搭接并固定连接在边框部212的搭接沿上,例如,后盖220可以通过背胶粘接在边框部212的搭接沿上。后盖220和中框210的中板部211之间通常具有间隙,该间隙形成前述的容纳空间,以在中框210的中板部211和后盖220之间的容纳空间内设置器件。为了提高后盖220和中框210之间的连接强度,在一些示例中,中框210的中板部211和后盖220之间通常还设置有挡墙、支撑柱等
支撑结构,这些支撑结构支撑在中板部211和后盖220之间,可以增强后盖220的强度,以防后盖220受力变形。另外,这些支撑结构还可以作为容纳空间内的器件的定位结构或安装结构。
以下主要对屏幕组件100组装于中框210的结构进行说明。
图3为相关技术中一种屏幕组件组装于中框的结构示意图;图4为相关技术中另一种屏幕组件组装于中框的结构示意图。参照图3和图4所示,图中以屏幕组件101搭载OLED(Organic Light-Emitting Diode,有机发光二极管)显示屏为例进行说明,也就是说,屏幕组件101可以包括OLED显示屏1011a及盖设在OLED显示屏1011a上的盖板1012。
应说明,屏幕组件101的屏占比的大小通常取决于盖板1012伸出至OLED显示屏1011a之外的宽度(图3和图4中所示的两条竖向虚线之间的宽度)。换言之,盖板1012伸出至OLED显示屏1011a之外的宽度越大,屏幕组件101的黑边宽度越大,屏幕组件101的边框越宽、屏占比越低;盖板1012伸出至OLED显示屏1011a之外的宽度越小,屏幕组件101的黑标宽度越小,屏幕组件101的边框越窄、屏占比越高。
其中,参照图3所示,目前的一些方案中,为了达到窄边框的效果,屏幕组件101仅通过背胶层103粘接在中框102的中板部1021上,盖板1012伸出至OLED显示屏1011a外的宽度很小,盖板1012和中框102的边框部1022之间无搭接。如此,屏幕组件101的黑边宽度d很小,屏幕组件101可以达到窄边框化效果,屏占比高,外观效果好。此时,屏幕组件101的侧壁与中框102的边框部1022之间具有微小宽度的缝隙,屏幕组件101通过该缝隙进行防护。
然而,由于OLED显示屏1011a和中框102的边框部1022之间存在缝隙,使得OLED显示屏1011a存在晃动风险,稳定性较差。并且,在长期使用过程中,该缝隙中容易堆积灰尘且外界水汽易通过该缝隙进入OLED显示屏1011a内,容易出现防护问题,例如,导致OLED显示屏1011a出现碎亮点、进液、静电击穿等问题。
参照图4所示,为了使整机具有较好的防护效果,目前的另一些方案中,在屏幕组件101通过背胶层103粘接在中框102的中板部1021的基础上,还在中框102的边框部1022上设置有台阶面1022a,将盖板1012的伸出至OLED显示屏1011a外的部分搭接在边框部1022的台阶面1022a上,并在盖板1012与边框部1022的台阶面1022a之间设置粘胶层104,通过粘胶层104将盖板1012与边框部1022粘接连接,粘胶层104填充了屏幕组件101与中框102的边框部1022之间的缝隙,借助粘胶层104对整机进行防护,可避免外界的灰尘、水汽等异物进入OLED显示屏1011a内,整机的可靠性高。
由于需要将盖板1012搭接在边框部1022的台阶面1022a上,则盖板1012伸出至OLED显示屏1011a外的宽度较大,以确保盖板1012与边框部1022的台阶面1022a之间具有足够的搭接面积。然而,这增大了屏幕组件101的黑边宽度,屏幕组件101的黑边宽度d较大,无法实现屏幕组件101的窄边框化效果,屏幕组件101的屏占比较低,外观效果不佳。
图5为相关技术中第三种屏幕组件组装于中框的结构示意图;图6为相关技术中第四种屏幕组件组装于中框的结构示意图。参照图5和图6所示,图中以屏幕组件101搭载LCD(Liquid Crystal Display,液晶显示器)显示屏为例进行说明,也就是说,屏幕组件101可以包括LCD显示屏1011b及盖设在LCD显示屏1011b上的盖板1012。
参照图5所示,与搭载OLED显示屏1011a的屏幕组件101类似的,为了使整机具有较好的防护效果,目前的一些方案中,对于搭载LCD显示屏1011b的屏幕组件101,在将屏幕组
件101通过背胶层103粘接在中框102的中板部1021的基础上,也可以在中框102的边框部1022上设置环绕边框部1022一周的环状的台阶面1022a,将盖板1012的各侧边缘均搭接在边框部1022的台阶面1022a上,盖板1012通过粘胶层104连接在边框部1022的台阶面1022a上,借助粘胶层104对整机进行防护。然而,此种方式,盖板1012伸出至LCD显示屏1011b外的宽度较大,屏幕组件101的黑边宽度d较大,无法实现屏幕组件101的窄边框化效果。
参照图6所示,为了提升屏幕组件101的外观效果,在另一些实施方式中,在利用背胶层103将屏幕组件101粘接在中框102的中板部1021的基础上,对屏幕组件101的至少部分侧边采用窄边框化连接方式。其中,参照图6(a)所示,屏幕组件101的部分侧边,例如,屏幕组件101的顶侧(通常为设有出音缝的一侧)及分别位于顶侧的两侧的左侧和右侧,盖板1012伸出至LCD显示屏1011b外的宽度很小,盖板1012和中框102的边框部1022之间无搭接,以使屏幕组件101的相应侧边达到窄边框化效果。参照图6(b)所示,屏幕组件101的其他侧边,例如,屏幕组件101的底边,仍然采用盖板1012搭接在边框部1022的台阶面1022a上,并通过粘胶层104与边框部1022粘接的方式。
应说明,LCD显示屏1011b与OLED显示屏1011a不同的是,LCD显示屏1011b为液晶成盒结构,其包括两块基板及夹设在两块基板之间的液晶分子,因而,对LCD显示屏1011b的封装要求较高,LCD显示屏1011b在两块基板之间设置有封框胶,在有些情况下,例如图6(a)中所示,LCD显示屏1011b的部分侧壁还可以设置侧封胶105,利用侧封胶105对LCD显示屏1011b的侧壁进行密封,以防LCD显示屏1011b漏液。并且,为了保证LCD显示屏1011b的密封性,对屏幕组件101的未与边框部1022搭接的这些侧边,通常要在屏幕组件101与边框部1022之间的缝隙填充胶水106进行密封,可以先在缝隙内填充低模量的支撑胶1061,支撑胶1061起到支撑于缓冲作用,再在支撑胶1061上填充填缝胶1062,填缝胶1062起到外观防护作用。
然而,对于屏幕组件101的各侧采用不同连接方式的情况,以盖板1012的底边搭接在边框部1022上的台阶面1022a上、屏幕组件101的其余侧边与边框部1022之间填充胶水106为例,屏幕组件101的底边的黑边宽度大、其余侧边的黑边宽度小,屏幕组件101的四边的黑边宽度差别较大,影响电子设备1的外观效果。并且,参照图7所示,图7示出了图6(a)中屏幕组件与边框部之间的胶水的分层结构,在屏幕组件101与中框102的边框部1022之间填充胶水106时,容易出现支撑胶1061外溢到屏幕组件101的外观面的情况,此时,模量不同的支撑胶1061与填缝胶1062之间存在分层缺陷,支撑胶1061与填缝胶1062的分界面之间存在缝隙,容易导致电子设备1出现外观橘皮、进液、静电击穿等问题。
有鉴于此,本申请实施例对屏幕组件100与中框210之间的组装结构进行改进,为便于说明,本实施例将屏幕组件100组装于中框210的整体结构定义为屏幕组件100组装结构,本实施例的屏幕组件100组装结构,通过在屏幕组件100与中框210的边框部1022之间的防护缝内设置防护胶层400,在实现窄边框化的基础上,利用防护胶层400对整机进行防护,防护胶层400既能起到外观填缝作用又能起到缓冲作用,可提升整机防护效果。
以下对本申请实施例的屏幕组件100组装结构进行详细说明。
图8为本申请实施例提供的一种屏幕组件组装结构的结构示意图。参照图8所示,本实施例中,屏幕组件100通过背胶层300粘接在中框210的中板部211上,构成背胶层300的胶材例如为压敏胶,示例性的,构成背胶层300的材料可以包括丙烯酸树脂、有机硅树脂、有
机硅橡胶、聚氨酯树脂等。对于应用在电子设备1中的背胶层300,背胶层300可以具有耐高温和耐老化的特性,以满足电子产品的长期使用要求。
其中,屏幕组件100包括层叠设置的显示屏110和保护盖板120。显示屏110位于屏幕组件100的靠近中框210的中板部211的一侧,显示屏110的正面用于显示图像信息,显示屏110的背面通过背胶层300粘接在中板部211上。保护盖板120位于显示屏110背离中板部211的一侧,保护盖板120盖设在显示屏110的正面,保护盖板120用于对显示屏110进行保护,避免显示屏110收到划伤或磕碰等损伤,保证显示屏110正常工作。并且,保护盖板120通常由具有较高强度、透明的材料制作而成,在保证保护盖板120具有足够强度以保护显示屏110的基础上,防止保护盖板120对显示屏110的显示效果造成影响。示例性的,保护盖板120可以为玻璃盖板或PET(Polyethylene terephthalate,聚对苯二甲酸乙二醇酯)盖板。
示例性的,保护盖板120和显示屏110之间可以通过光学胶(Optically Clear Adhesive,OCA)连接,换言之,保护盖板120和显示屏110之间可以设置有光学胶层(图中未示出)。光学胶层透明度高、光透过率可达99%以上,黏着力高,且具有耐高温、抗紫外线等特性,能够保证将保护盖板120和显示屏110连接牢靠,并且,光学胶层还可以增加显示屏110的亮度和对比度,提升屏幕组件100的显示效果。
另外,本实施例将中框210的边框部212伸向保护盖板120的侧方的一端定义为其前端面,图8中为便于指示屏幕组件100与中框210之间的连接结构,未示出中框210与后盖220之间的配合结构,应理解,在实际应用中,中框210的边框部212还可以具有向后盖220一侧伸出的部分,边框部212伸向后盖220的侧方的一端为其后端面。
为实现电子设备1的窄边框效果,本实施例中,屏幕组件100与中框210的边框部212之间采用无搭接的方式,屏幕组件100的侧壁与边框部212之间具有防护缝(图中未示出)。一方面,该防护缝为屏幕组件100与中框210提供装配间隙,使得中框210的边框部212围成的区域的面积略微大于屏幕组件100的面积,以便于屏幕组件100顺利贴装在中框210的中板部211上;另一方面,该防护缝为屏幕组件100提供基础防护,避免中框210的边框部212直接接触屏幕组件100的侧壁,以防边框部212与屏幕组件100硬接触而对屏幕组件100造成损伤,例如可以防止造成屏幕组件100被磨损或出现局部碎亮点。
继续参照图8所示,对于屏幕组件100与边框之间形成防护缝的结构,由于保护盖板120与中框210的边框部212之间无需搭接并粘接,因而,在保证保护盖板120可完全覆盖显示屏110,能够充分保护显示屏110的基础上,保护盖板120伸出至显示屏110外(显示屏110的侧方)的宽度可以很小,屏幕组件100的黑边宽度很小,屏幕组件100的边框窄、屏占比高,可以满足电子设备1的窄边框化需求,提升电子设备1的外观效果。
在屏幕组件100与中框210的边框部212之间以防护缝的形式进行窄缝防护的基础上,本实施例中,在屏幕组件100的侧壁与边框部212之间的防护缝内还填充有防护胶层400,通过防护胶层400封堵防护缝,利用防护胶层400对电子设备1进行防护,以防外界的灰尘、水汽、油脂等异物从防护缝进入显示屏110内,保护显示屏110的工作性能,以防显示屏110出现进液、静电击穿等问题。
在一些实施方式中,防护胶层400可以由中框210的边框部212的前端面向中板部211延伸,也就是说,防护胶层400的顶端(防护胶层400朝向屏幕组件100的外观面的一端)可以与边框部212的前端面大致保持平齐。在实际应用中,通常是将流体状态的防护胶涂覆
在防护缝内,之后,待防护胶固化后形成防护胶层400,通过使防护胶层400的顶端与边框部212的前端面平齐,便于防护胶层400的形成,并且,边框部212对防护胶层400的保护作用较好。
施胶时,将流体状态的防护胶涂覆在防护缝内后,以边框部212的前端面为界面,将溢出在边框部212的前端面之上的防护胶擦除,保留防护缝内的防护胶,受边框部212的支撑,便于防护胶的固化成型。并且,防护胶固化成型后,不存在暴露在边框部212之上的部分,防护胶层400几乎全部位于边框部212的遮挡区域内,边框部212可保护防护胶层400不被刮擦、磨损,有利于保护防护胶层400的完整性,防护胶层400的稳定性好,可延长防护胶层400的使用寿命。
其中,沿屏幕组件100的厚度方向,防护胶层400可以分为高模量部410和低模量部420,高模量部410靠近屏幕组件100的正面,低模量部420位于高模量部410朝向中板部211的一侧,也可以说,高模量部410位于低模量部420背离中板部211的一侧。高模量部410的模量较高、硬度高,低模量部420的模量较低、弹性好,通过防护胶层400的高模量部410和低模量部420,可同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏110内,保护显示屏110的工作性能,同时,也能够在中框210的边框部212与屏幕组件100的侧壁之间提供缓冲,防止屏幕组件100受到损伤。
高模量部410从屏幕组件100的正面所在的一侧向中框210的中板部211延伸,也就是说,高模量部410位于屏幕组件100的外观面所在的一侧,高模量部410有保护盖板120的侧方向显示屏110的侧方延伸。高模量部410的模量较高、硬度高,可以起到良好的粘接作用,高模量部410使得防护胶层400可长期、稳定地封堵防护缝,避免外界的灰尘、水汽、油脂等异物进入显示屏110内,保护显示屏110的工作性能。防护胶层400主要通过高模量部410起到整机防护作用,其可保证防护胶层400不被磨损或划伤,在长期使用过程中,尤其是在碰撞或跌落等风险场景下,高模量部410也可保证防护胶层400不会出现变形、裂缝等不良现象,保证防护胶层400维持长期有效的整机防护效果,延长防护胶层400的使用寿命。
低模量部420位于高模量部410和中框210的中板部211之间,低模量部420的模量较低,低模量部420的硬度较低、弹性较好,能够产生弹性形变。低模量部420的膨胀系数,为防护胶层400填充防护缝提供了稳定保障,并且,为高模量部410提供支撑基础。低模量部420主要对应显示屏110的侧方所在的区域设置,通过低模量部420填充显示屏110的侧方与边框部212之间的缝隙,低模量部420的弹性性能可起到良好的缓冲作用,避免了边框部212与显示屏110之间的硬接触,可保护显示屏110不受损伤,尤其是在碰撞或跌落等风险场景下,低模量部420可吸收冲击力,防止显示屏110出现磨损、碎亮点、缝隙等缺陷。
另外,防护胶层400虽具有高模量部410和低模量部420,但其仍是整体式的胶层,相较于前述的在屏幕组件100和中框210的边框部212之间填充支撑胶1061和填缝胶1062两种胶水,本实施例的防护胶层400整体性好,不存在胶层内分层现象,更不存在分层界面处出现缝隙的现象,不会导致外观橘皮、进液和静电击穿等现象。
根据防护胶层400的高模量部410的延伸深度,显示屏110的侧方所在的厚度区域内既有高模量部410也有低模量部420,换言之,高模量部410向中框210的中板部211延伸的底侧高于保护盖板120的背面(保护盖板120朝向显示屏110的一侧表面)所在的平面;或者,显示屏110的侧方所在的厚度区域内可以只存在低模量部420,换言之,高模量部410向中框210
的中板部211延伸的底侧低于显示屏110的正面(显示屏110朝向盖板的一侧表面)所在的平面。总而言之,显示屏110的侧方所在的厚度区域内,至少部分厚度区域被低模量部420覆盖,以通过低模量部420的缓冲作用,保护显示屏110不受损伤。
参照图8所示,可以通过控制防护胶层400的高模量部410的延伸深度,使显示屏110的正面所在的侧端位于低模量部420覆盖的范围内,换言之,显示屏110的侧壁朝向保护盖板120的一端位于低模量部420覆盖的范围内,如此,显示屏110的侧方所在的厚度区域内,只存在低模量部420。首先,对于防护缝而言,显示屏110的侧壁与中框210的边框部212之间的缝宽略大于保护盖板120与边框部212之间的缝宽,显示屏110的侧方所在的厚度区域内覆盖的低模量部420的范围越大,防护胶层400越容易填充显示屏110与边框部212之间的缝隙。再者,显示屏110的侧方所在的厚度区域只存在低模量部420,实现了显示屏110的侧方的缓冲区域的最大化,防护胶层400吸收冲击力的效果更好,对显示屏110的防护效果更佳。
例如,可以控制防护胶层400的高模量部410的底侧大致位于保护盖板120和显示屏110之间的界面处,也就是说,防护胶层400中,高模量部410和低模量部420大致以保护盖板120和显示屏110之间的界面为界。对于从边框部212的顶端面向中板部211延伸的防护胶层400,既可以保证高模量部410具有足够的延伸深度,能够满足防护胶层400的粘接强度要求和防护需求,也使得低模量部420最大化的覆盖显示屏110的侧壁,保证防护胶层400的填缝效果及对显示屏110的缓冲保护作用。应理解,防护胶层400为整体式的胶层,此处所指的界面并非肉眼能观察到的存在分层的界面。
示例性的,可以通过调控防护胶层400的固化参数,将防护胶层400的高模量部410的深度范围控制在0.4mm~0.6mm之间。如此,既可以使防护胶层400具有足够深度的高模量部410,防护胶层400的粘接强度高,可满足屏幕组件100和中框210的边框部212之间的连接强度需求,可起到有效的防护作用以阻止外界环境中的灰尘、水汽和油脂等异物进入显示屏110;同时,防护胶层400在高模量部410下方的区域也足够的深度以形成低模量部420,可满足填缝需求和对显示屏110起到良好的缓冲保护作用。
例如,防护胶层400的高模量部410的深度可以为0.42mm、0.44mm、0.46mm、0.48mm、0.50mm、0.52mm、0.54mm、0.56mm、0.58mm等。
至于防护胶层400的模量设置,防护胶层400的高模量部410的模量范围可以为40Mpa-70Mpa,以使高模量部410具有较高的硬度,高模量部410使得防护胶层400具有足够的粘接强度,将屏幕组件100和中框210的边框部212连接紧密、牢靠,起到较好的防护效果。示例性的,防护胶层400的高模量部410的模量可以为45Mpa、50Mpa、55Mpa、60Mpa、65Mpa等。
防护胶层400的低模量部420的模量范围可以为5Mpa-35Mpa,以使低模量部420具有足够的弹性形变性能,低模量部420可填缝完全并使得防护胶层400具有良好的缓冲作用,吸收中框210的边框部212对显示屏110的冲击力,保护显示屏110不受损伤。示例性的,防护胶层400的低模量部420的模量范围可以为5Mpa-25Mpa,例如,低模量部420的模量可以为8Mpa、10Mpa、12Mpa、15Mpa、18Mpa、20Mpa、22Mpa等。
另外,构成防护胶层400的防护胶的粘度可以为20000-100000cps,以使防护胶具有足够的稳定性,施胶后,防护胶可以稳定地附着在中框210的边框部212上,确保防护胶层400能够将屏幕组件100和边框部212连接紧密、牢靠。示例性的,防护胶层400的粘度可以为
30000cps、40000cps、50000cps、60000cps、70000cps、80000cps、90000cps等。
构成防护胶层400的防护胶的触变值可以大于2。需要说明的是,防护胶的触变性是指防护胶400a在一定的剪切速率作用下,其剪切应力随时间延长而减小的特性,具体为:搅动下,防护胶粘度迅速下降,便于涂覆;停止时,防护胶的粘度立即增大,不会随意流淌。通过使构成防护胶层400的防护胶的触变值大于2,使得防护胶在外力作用下可以顺利涂覆在中框210的边框部212上,并且,涂覆完成后,防护胶可以稳定的停留在边框部212上。
固化后的防护胶层400的断裂伸长率可以大于300%,以使防护胶层400在具有足够的粘结强度的基础上,防护胶层400的韧性较好,即使在碰撞、跌落等风险场景下,防护胶层400也不会轻易断裂分层,以使防护胶层400能够长久地维持良好的防护性能。
至于如何形成具有高模量部410和低模量部420的防护胶层400,本实施例中,防护胶层400可以为由第一固化方式和第二固化方式共同固化形成的胶层,通过两种不同的固化方式固化形成防护胶层400,使得防护胶层400具有模量不同的高模量部410和低模量部420,以使防护胶层400同时起到粘接固定作用和缓冲作用。
在一些实施方式中,构成防护胶层400的防护胶的主体树脂可以由光固化树脂和湿气固化树脂共同组成,换言之,防护胶层400可以经由光固化方式和湿气固化方式共同固化形成。此时,前述的第一固化方式可以为光固化方式,光固化方式例如为UV(Ultraviolet Rays,紫外线)光固化方式。前述的第二固化方式可以为湿气固化方式,顾名思义,湿气固化为防护胶与空气中的湿气(水分子)发生反应进行固化。
例如,在防护缝内涂覆完防护胶之后,在防护胶的朝向保护盖板120的一侧设置光源(例如UV光源),利用光源3照射防护胶,使防护胶的靠近保护盖板120的部分经光固化和湿气固化共同形成高模量部410,而防护胶的靠近中框210的中板部211的部分由于离光源较远,该部分仅经过湿气固化形成低模量部420。
示例性的,构成防护胶层400的防护胶的组成成分可以包括:UV湿气双固化树脂(质量分数占比为10-50%)、UV湿气双固化单体(质量分数占比为5-40%)、聚氨酯预聚体(质量分数占比为2-10%)、光引发剂(质量分数占比为0.5-5%)、硅烷偶联剂(质量分数占比为0.5-5%)、湿气固化催化剂(质量分数占比为0.5-5%)、流变改进剂(质量分数占比为0.5-5%)、颜料(质量分数占比为0.5-5%)等。
其中,UV湿气双固化树脂可以是含有异氰酸酯基和自由基聚合性基团的树脂;UV湿气双固化单体可以是含有异氰酸酯基和自由基聚合性基团的单体化合物或混合物;聚氨酯预聚体可以为多元醇与异氰酸酯固化剂反应的端基为异氰酸酯基的化合物;光引发剂可以包括二苯甲酮系化合物、苯乙酮系化合物、酰基氧化膦系化合物、二茂钛系化合物、肟酯系化合物、苯偶姻醚系化合物、噻吨酮中的至少一种;硅烷偶联剂可以包括含有可水解官能团的甲氧基硅或乙氧基硅的氨基偶联剂、环氧基硅烷偶联剂、巯基硅烷偶联剂等偶联剂中的至少一种;湿气固化催化剂可以包括有机锡类化合物、α硅烷偶联剂、钛酸酯类化合物中的至少一种;流变改进剂可以包括二氧化硅、碳酸钙、硫酸钡中的至少一种;颜料可以为黑色颜料,黑色颜料可以包括炭黑、碳纳米管、石墨烯中的至少一种。
继续参照图8所示,图中以屏幕组件100搭载的显示屏110为OLED显示屏110为例进行说明,OLED显示屏110的背面通过背胶层300粘接在中框210的中板部211上,保护盖板120伸出OLED显示屏110的侧边的宽度很窄,防护胶层400填充在保护盖板120及OLED显示屏
110与中框210的边框部212之间形成的防护缝内,防护胶层400起到外观填缝作用,使屏幕组件100具有窄边框效果,且防护胶层400的缓冲作用可保护OLED显示屏110不受损伤。
通常,OLED显示屏110朝向中框210的中板部211的一侧设有接地层(图中未示出),构成接地层的材料例如为铜箔,接地层可以起到电磁屏蔽及抗静电的作用,以提升电子设备1的工作性能。对于搭载OLED显示屏110的屏幕组件100组装结构10,参照图8所示,本实施例中,填充在屏幕组件100与中框210的边框部212之间的防护胶层400,可以延伸至OLED显示屏110的背面,并与OLED显示屏110的背面的接地层的表面接触。
根据构成防护胶层400的胶材的特性,防护胶层400通常具有导电性能,通过使防护胶层400延伸至OLED显示屏110的背面与接地层接触,防护胶层400连接在保护盖板120和接地层之间,能够将保护盖板120表面附着的静电电荷传导至接地层,消除静电电荷对屏幕组件100带来的危害。
其中,OLED显示屏110一般是靠薄膜晶体管驱动像素电路,薄膜晶体管例如为LTPS(Low Temperature Poly-silicon,低温多晶硅)薄膜晶体管,静电会导致薄膜晶体管的漏电流增大,而致使无法关闭像素、充电时间不足等问题,具体到显示上,会出现绿屏(由于薄膜晶体管的漏电流增大,导致开启电压最低的绿色像素常亮)、亮度不均匀、屏闪等现象。也就是说,本实施例通过防护胶层400连接保护盖板120和OLED显示屏110的接地层,可以消除静电电荷,解决绿屏、亮度不均、屏闪等问题。
形成防护胶层400时,可以通过控制施胶量,屏幕组件100安装于中框210之后,在屏幕组件100的挤压作用下,使得防护胶层400延伸至与背胶层300的端面接合。一方面,可确保防护胶层400将屏幕组件100与中框210的边框部212之间的防护缝填充完全,保证防护胶层400具有良好的防护和缓冲作用;另一方面,在实际应用中,背胶层300的边缘与OLED显示屏110的边缘之间通常具有一定的距离,通过使防护胶层400与背胶层300接合,可确保防护胶层400延伸至OLED显示屏110的背面,以使防护胶层400与OLED显示屏110背面的接地层稳定接触。
图9为本申请实施例提供的另一种屏幕组件组装结构的结构示意图。参照图9所示,图中以屏幕组件100搭载的显示屏110为LCD显示屏110b为例进行说明,与前述的OLED显示屏110类似的,LCD显示屏110b的背面通过背胶层300粘接在中框210的中板部211上,保护盖板120伸出LCD显示屏110b的侧边的宽度很窄,防护胶层400填充在保护盖板120及LCD显示屏110b与中框210的边框部212之间形成的防护缝内,防护胶层400起到外观填缝作用,使屏幕组件100具有窄边框效果,且防护胶层400的缓冲作用可保护LCD显示屏110b不受损伤。
其中,根据LCD显示屏110b自身的特点,参照图9(a)所示,搭载LCD显示屏110b的屏幕组件100的几侧(例如顶侧、左侧和右侧)的结构与搭载OLED显示屏110的屏幕组件100的结构类似,对于屏幕组件100的这几侧,防护胶层400填充在屏幕组件100的侧壁与中框210的边框部212之间。由于LCD显示屏110b的背面所在的一侧不存在OLED显示屏110的接地层,因而,通过控制施胶量,可以使防护胶层400延伸至LCD显示屏110b的背面,或者,如图9(a)所示,也可以是防护胶层400仅填充在防护缝内,防护胶层400与中框210的中板部211之间可以具有间隙。
参照图9(b)所示,图9(b)中示出了LCD显示屏110b的侧边设有电路板130的情况,
在一些实施方式中,该电路板130可以为驱动LCD显示屏110b的薄膜晶体管工作的电路板130;在另一些实施方式中,该电路板130可以为对背光源(图中未示出)输送电流的电路板130。应说明,与OLED显示屏110不同的是,LCD显示屏110b需要配置背光源为其提供照明,背光源可以设置在LCD显示屏110b的侧方(一侧或两侧),例如,背光源可以设置在LCD显示屏110b的底侧,背光源例如可以为设置在电路板130上的灯珠。
无论是驱动薄膜晶体管工作的电路板130,还是为背光源输送电流的电路板130,示例性的,电路板130可以为图中示出的FPC(Flexible Printed Circuit board,柔性电路板130),或者,电路板130还可以为PCB(Printed Circuit Board,印制电路板130)。电路板130例如可以贴装在中框210的边框部212的内侧壁(边框部212朝向中板部211的一侧壁面)上,例如,图中示出的中框210的边框部212内侧壁上开设有定位槽2121,该定位槽2121可以用于容纳和定位电路板130。
由于电路板130占据防护缝的一定空间,因而,防护缝中填充的防护胶层400可以支撑在电路板130上,防护胶层400可以从大致与边框部212的前端面平齐的部位向下延伸至支撑在电路板130上,防护胶层400可以覆盖保护盖板120的侧方空间和LCD显示屏110b侧方的部分空间。
本申请实施例还提供一种屏幕组件100组装方法(以下简称组装方法),该组装方法用于组装形成前述的屏幕组件100组装结构10,以下对该组装方法进行详细说明。
图10为本申请实施例提供的组装方法的步骤流程图;图11为本申请实施例提供的一种屏幕组件组装结构的工艺流程图;图12为本申请实施例提供的另一种屏幕组件组装结构的工艺流程图。
参照图10所示,该组装方法包括如下步骤:
S100、在中框的边框部上涂覆防护胶。
图11以屏幕组件100搭载OLED显示屏110a为例,示出了屏幕组件100组装于中框210的过程中,不同阶段的状态结构。参照图11(a)所示,首先是将流体状态的防护胶400a涂覆在中框210的边框部212上,使防护胶400a主要覆盖在边框部212的前端面和内侧壁(边框部212朝向中板部211的一侧壁面)上。
由于处于流体状态的防护胶400a具有一定的流动性,为了保证形成的防护胶层400能够将屏幕组件100与中框210的边框部212之间的防护缝填充完全,需要使涂覆的流体状态的防护胶400a稳定的覆盖在中框210的边框部212上。对此,本实施例中,可以采用将中框210以预设角度倾斜放置的方式,以通过点胶方式施胶为例,喷涂防护胶400a的喷头2可以位于中框210的边框部212的上方,使边框部212的内侧壁朝向防护胶400a的喷射方向倾斜,这样,边框部212的内侧壁上承接防护胶400a的面积更大,倾斜的边框部212的内侧壁可阻碍防护胶400a沿其表面流动,能够使防护胶400a稳定在边框部212的内侧壁上,并且,边框部212的前端面也覆盖有足够厚度的防护胶400a,可以使防护胶400a稳定的覆盖在边框部212上。
其中,前述的预设角度,即中框210的倾斜角度可以在0~45°之间,换言之,中框210的中板部211与水平面之间的夹角可以在0~45°之间。例如,中框210的中板部211与水平面之间的夹角可以为5°、10°、15°、20°、25°、30°、35°、40°等。
示例性的,可以采用五轴点胶机涂覆防护胶400a,五轴点胶机除了包括X、Y、Z三个直线轴外,还包括两个旋转轴,其能够完成空间曲线轨迹,几乎能够保证从任意角度接近
工件。相较于传统垂直向下点胶/涂覆,五轴点胶机的施胶工艺更加紧密、牢固,可以针对狭小区域点胶、避免碰撞,并且,喷头2可以实时调节倾斜角度,能够满足工件上不同区域、不同形状的点胶/涂覆要求,也可以减少人工介入,自动化程度高。
S200、将屏幕组件安装在中框上,屏幕组件的侧壁挤压防护胶。
参照图11(b)所示,将流体状的防护胶400a涂覆在中框210的边框部212上之后,接下来,将屏幕组件100安装在中框210上,中框210的中板部211(或屏幕组件100)上事先涂覆了一层背胶层300,屏幕组件100通过背胶层300粘接在中框210的中板部211上,屏幕组件100的侧壁和中框210的边框部212之间具有间隙,该间隙形成防护缝。并且,屏幕组件100的侧壁挤压防护胶400a,以使得后续固化形成的防护胶层400能够将屏幕组件100和中框210的边框部212连接紧密,确保防护胶层400能够起到充分的防护作用。
其中,在将屏幕组件100安装在中框210上之前,可以事先将保护盖板120和显示屏110组装在一起,例如,可以通过前述的光学胶将保护盖板120和显示屏110连接起来。
需要说明的是,在中框210的边框部212上涂覆的防护胶400a的胶量,通常需要多于填充防护缝实际需要的胶量,以保证防护胶400a能够将防护缝填充完全,将屏幕组件100和边框部212连接紧密。在将屏幕组件100安装在中框210上之后,屏幕组件100将多余的防护胶400a挤出,多余的防护胶400a溢出在边框部212的前端面之上。此时,需要擦除溢出在边框部212的前端面之上的防护胶400a,参照图11(c)所示,使得防护胶400a的表面大致与边框部212的前端面平齐,防护胶400a几乎全部位于防护缝内,边框部212可支撑防护胶400a对其进行定位,有利于防护胶400a固化成型,并且,防护胶400a固化成型后,防护胶层400位于边框部212的遮挡区域内,边框部212可保护防护胶层400不被刮擦、磨损。
另外,本实施例以先在中框210的边框部212上涂覆防护胶400a,再将屏幕组件100安装于中框210为例,这样,可以保证防护胶400a的施胶量充足,通过屏幕组件100的挤压作用,可保证防护胶400a紧密的填充在屏幕组件100和边框部212之间。在另一些实施方式中,只要满足防护胶400a能够充分填充屏幕组件100与边框部212之间的防护缝,也可以先将屏幕组件100安装在中框210的中板部211上,屏幕组件100与中框210的边框部212之间先形成防护缝,之后,再向防护缝内涂覆防护胶400a,通过防护胶400a的流动性,使防护胶400a将防护缝的缝宽填充完全,本实施例对此不作限制。
S300、固化防护胶,形成防护胶层。
参照图11(d)所示,屏幕组件100安装于中框210并将防护胶400a挤压紧密,且擦除了多余的防护胶400a之后,便是对防护胶400a进行固化,以形成稳定的防护胶层400。其中,固化形成的防护胶层400具有高模量部410和低模量部420,高模量部410靠近屏幕组件100的正面,低模量部420位于高模量部410朝向中板部211的一侧,也可以说,高模量部410位于低模量部420背离中板部211的一侧。
如此,形成的防护胶层400中,高模量部410的模量较高、硬度高,低模量部420的模量较低、弹性好,通过防护胶层400的高模量部410和低模量部420,可同时起到防护作用和缓冲作用,既能够防止外界异物进入显示屏110内,保护显示屏110的工作性能,同时,也能够在中框210的边框部212与屏幕组件100的侧壁之间提供缓冲,防止屏幕组件100受到损伤。
示例性的,形成的防护胶层400中,高模量部410的模量范围可以为40Mpa-70Mpa,低
模量部420的模量范围可以为5Mpa-35Mpa,不再赘述。
为了使形成的防护胶层400具有高模量部410和低模量部420,如前所述,防护胶层400可以经由第一固化方式和第二固化方式两种不同固化方式共同固化形成,换言之,可以采用第一固化方式和第二固化方式对防护胶400a进行固化,以使形成的防护胶层400具有高模量部410和低模量部420。
其中,第一固化方式可以为光固化方式,光固化方式例如为如前所述的UV光固化方式,第二固化方式可以为湿气固化方式。为了使防护胶400a能够经光固化和湿气固化两种固化方式固化成型,构成防护胶400a的主体树脂可以由光固化树脂和湿气固化树脂共同组成,此外,防护胶400a的成分还可以包括聚氨酯预聚体、光引发剂、硅烷偶联剂、湿气固化催化剂、流变改进剂和颜料等,不再赘述。
参照图11(d)所示,固化防护胶400a时,在防护胶400a的朝向保护盖板120的一侧设置光源3(例如UV光源),利用光源3照射防护胶400a,使防护胶400a的靠近保护盖板120的部分经光固化和湿气固化共同形成高模量部410,而防护胶400a的靠近中框210的中板部211的部分由于离光源3较远,该部分仅经过湿气固化形成低模量部420。其中,防护胶400a在固化过程中,防护胶400a整体均会和空气中的水分子发生反应而固化,该固化方式即为湿气固化方式。
应说明图11以屏幕组件100搭载的显示屏110为OLED显示屏110a为例进行说明,针对于OLED显示屏110a的背面设置有接地层(图中未示出)的情况,涂覆防护胶400a时,可以适当增加胶量,屏幕组件100安装在中框210上之后,挤压防护胶400a使其延伸至OLED显示屏110a的背面,以使防护胶400a连接保护盖板120和OLED显示屏110a背面的接地层,以消除静电电荷,解决绿屏、亮度不均、屏闪等问题。
参照图12所示,图12以屏幕组件100搭载的显示屏110为LCD显示屏110b为例进行说明,搭载LCD显示屏110b的屏幕组件100组装于中框210的工艺流程,与搭载OLED显示屏110a的屏幕组件100组装于中框210的工艺流程类似,此处不再赘述。
其中,参照图12(a)所示,对于搭载LCD显示屏110b的屏幕组件100的各侧结构中,与搭载OLED显示屏110a的屏幕组件100的结构类似的几侧,例如,搭载LCD显示屏110b的屏幕组件100的顶侧、左侧和右侧,由于LCD显示屏110b的背面不存在接地层,因而,施胶时,可以控制这些侧的胶量保持与搭载OLED显示屏110a的屏幕组件100的胶量近似,以使防护胶层400延伸至LCD显示屏110b的背面,或者,如图12(a)所示,也可以适当减少这几侧涂覆的胶量,以使防护胶层400仅填充在防护缝内,防护胶层400与中框210的中板部211之间具有间隙。
参照图12(b)所示,对于搭载LCD显示屏110b的屏幕组件100中设置有电路板130的侧边(例如屏幕组件100的底侧),由于电路板130占据防护缝的一定空间,形成的防护胶层400可以支撑在电路板130上,防护胶层400可以覆盖保护盖板120的侧方空间和LCD显示屏110b侧方的部分空间。因而,施胶时,可以相应减少该侧涂覆的胶量,以免将屏幕组件100安装于中框210后,溢胶量太多,对防护胶400a造成浪费。
在本申请实施例的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应作广义理解,例如,可以是固定连接,也可以是通过中间媒介间接相连,可以是两个元件内部的连通或者两个元件的相互作用关系。对于本领域的普通技术人
员而言,可以根据具体情况理解上述术语在本申请实施例中的具体含义。
本申请实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。
Claims (20)
- 一种屏幕组件组装结构,其特征在于,包括屏幕组件、中框和防护胶层;所述中框包括中板部和边框部,所述边框部围设在所述中板部的周侧;所述屏幕组件支撑在所述中板部上,所述屏幕组件的侧壁与所述边框部之间具有防护缝,所述防护胶层填充在所述防护缝内;其中,沿所述屏幕组件的厚度方向,所述防护胶层分为高模量部和低模量部,所述高模量部位于所述低模量部背离所述中板部的一侧。
- 根据权利要求1所述的屏幕组件组装结构,其特征在于,所述屏幕组件包括显示屏和保护盖板,所述显示屏连接在所述中板部上,所述保护盖板位于所述显示屏背离所述中板部的一侧;所述高模量部由所述保护盖板的侧方向所述显示屏的侧方延伸,所述低模量部覆盖所述显示屏的侧方的至少部分区域。
- 根据权利要求2所述的屏幕组件组装结构,其特征在于,所述显示屏的侧壁朝向所述保护盖板的一端位于所述低模量部覆盖的范围内。
- 根据权利要求2所述的屏幕组件组装结构,其特征在于,所述边框部伸向所述保护盖板的侧方的一端为其前端面,所述防护胶层由所述前端面向所述中板部延伸。
- 根据权利要求2-4任一项所述的屏幕组件组装结构,其特征在于,所述显示屏与所述中板部之间设置有背胶层。
- 根据权利要求5所述的屏幕组件组装结构,其特征在于,所述显示屏为OLED显示屏。
- 根据权利要求6所述的屏幕组件组装结构,其特征在于,所述OLED显示屏朝向所述中板部的一侧设有接地层,所述防护胶层延伸至与所述接地层的表面接触。
- 根据权利要求7所述的屏幕组件组装结构,其特征在于,所述防护胶层延伸至与所述背胶层的端面接合。
- 根据权利要求5所述的屏幕组件组装结构,其特征在于,所述显示屏为LCD显示屏。
- 根据权利要求9所述的屏幕组件组装结构,其特征在于,所述LCD显示屏的至少一侧连接有电路板,所述电路板位于所述防护缝内,所述防护胶层支撑在所述电路板上。
- 根据权利要求1-10任一项所述的屏幕组件组装结构,其特征在于,所述高模量部的模量范围为40Mpa-70Mpa,所述低模量部的模量范围为5Mpa-35Mpa。
- 根据权利要求1-11任一项所述的屏幕组件组装结构,其特征在于,所述防护胶层为经第一固化方式和第二固化方式共同固化形成的胶层。
- 根据权利要求12所述的屏幕组件组装结构,其特征在于,所述第一固化方式为光固化方式,所述第二固化方式为湿气固化方式。
- 根据权利要求1-13任一项所述的屏幕组件组装结构,其特征在于,沿所述屏幕组件的厚度方向,所述高模量部的深度范围为0.4mm-0.6mm。
- 一种屏幕组件组装方法,其特征在于,包括:在中框的边框部上涂覆防护胶;将屏幕组件安装在所述中框上,所述屏幕组件的侧壁挤压所述防护胶;固化所述防护胶,形成防护胶层;其中,所述防护胶层具有高模量部和低模量部,所述高模量部位于所述低模量部背离所述中框的中板部的一侧。
- 根据权利要求15所述的屏幕组件组装方法,其特征在于,所述固化所述防护胶,包括:采用第一固化方式和第二固化方式对所述防护胶进行固化,以使所述防护胶层形成高模量部和低模量部。
- 根据权利要求16所述的屏幕组件组装方法,其特征在于,所述第一固化方式为光固化方式,所述第二固化方式为湿气固化方式,所述固化所述防护胶,包括:在背离所述中板部的一侧对所述防护胶进行光照,以通过所述光固化方式对所述防护胶进行固化;使所述防护胶与空气发生反应,以通过所述湿气固化方式对所述防护胶进行固化。
- 根据权利要求15-17任一项所述的屏幕组件组装方法,其特征在于,所述在中框的边框部上涂覆防护胶,包括:将所述中框以预设角度倾斜放置,使所述边框部的内侧壁朝向所述防护胶的喷射方向倾斜;其中,所述边框部的内侧壁为所述边框部朝向所述中框的中板部的一侧壁面。
- 根据权利要求15-18任一项所述的屏幕组件组装方法,其特征在于,所述固化所述防护胶之前,还包括:擦除溢出在所述边框部的前端面之上的防护胶,使所述防护胶的表面与所述边框部的前端面平齐。
- 一种电子设备,其特征在于,包括后盖和权利要求1-14任一项所述的屏幕组件组装结构,所述后盖与中框连接,且所述后盖位于所述中框背离屏幕组件的一侧。
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CN110752317A (zh) * | 2019-11-08 | 2020-02-04 | 深圳市华星光电半导体显示技术有限公司 | 显示面板及其制备方法 |
CN111540839A (zh) * | 2020-04-27 | 2020-08-14 | 深圳市华星光电半导体显示技术有限公司 | 显示面板的制造方法和显示面板 |
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US20200249517A1 (en) * | 2016-05-27 | 2020-08-06 | Huawei Technologies Co., Ltd. | Component including housing and screen |
WO2018120418A1 (zh) * | 2016-12-27 | 2018-07-05 | 华为技术有限公司 | 一种显示屏安装结构、电子设备及显示屏的安装方法 |
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CN215934895U (zh) * | 2021-07-16 | 2022-03-01 | 荣耀终端有限公司 | 显示模组及电子设备 |
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CN217880265U (zh) * | 2022-05-20 | 2022-11-22 | 荣耀终端有限公司 | 一种电子设备 |
CN116708617A (zh) * | 2022-11-28 | 2023-09-05 | 荣耀终端有限公司 | 屏幕组件组装结构及其组装方法、电子设备 |
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