WO2022166722A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2022166722A1
WO2022166722A1 PCT/CN2022/074094 CN2022074094W WO2022166722A1 WO 2022166722 A1 WO2022166722 A1 WO 2022166722A1 CN 2022074094 W CN2022074094 W CN 2022074094W WO 2022166722 A1 WO2022166722 A1 WO 2022166722A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
outer frame
frame wall
bending
receiving plate
Prior art date
Application number
PCT/CN2022/074094
Other languages
English (en)
French (fr)
Inventor
杜继香
程宁宁
李金龙
吕寻可
张王军
马吉航
贾文鹏
Original Assignee
海信视像科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202110164550.7A external-priority patent/CN112965280B/zh
Priority claimed from CN202110970511.6A external-priority patent/CN115712212A/zh
Application filed by 海信视像科技股份有限公司 filed Critical 海信视像科技股份有限公司
Publication of WO2022166722A1 publication Critical patent/WO2022166722A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices

Definitions

  • the present application relates to the technical field of display devices, and in particular, to a display device.
  • Liquid crystal displays are one of the main types of display devices, which are widely used in electronic equipment.
  • the liquid crystal display includes a backlight, a liquid crystal panel, a middle frame, and the like.
  • the middle frame is mainly used to support the liquid crystal panel, the limiting optical film and the diffusion plate.
  • the middle frame of the related art is integrally injection-molded with an injection mold.
  • the cost of such an injection mold is very high, and the investment in product development is relatively large.
  • the application provides a display device, the display device includes: a middle frame, including an outer frame wall, a receiving plate, an inner frame wall and a retaining rib that are integrally connected; the receiving plate is protruded from an inner side wall formed on the outer frame wall the inner frame wall is bent and extended backward from the inner frame wall of the receiving plate; the retaining rib is bent and extended in the direction of the outer frame wall from the rear edge of the inner frame wall; A accommodating cavity is enclosed between the inner frame wall, the receiving plate and the outer frame wall; the display panel is located on the front side of the middle frame and is attached to the front side wall of the receiving plate; and the back plate is located at the front side of the receiving plate.
  • the rear side of the middle frame, and the retaining rib sandwiches the edge of the back plate in the accommodating cavity.
  • the periphery of the back plate is formed with a wrapping edge extending forward, and the front side edge of the wrapping edge is formed with a fold extending toward the central side of the back plate; It is arranged on the inner side wall of the outer frame wall; the folded edge is attached to the rear side wall of the receiving plate and clamped in the accommodating cavity.
  • a first adhesive strip is attached between the folded edge and the rear side wall of the receiving plate.
  • a second adhesive strip is attached between the front side wall of the receiving plate and the display panel.
  • a stepped groove is formed between the front end of the outer frame wall and the front side wall of the receiving plate, and the display panel is installed in the stepped groove.
  • the outer side wall, the front end wall and the rear end wall of the outer frame wall are all covered with an appearance film; on the inner side wall of the outer frame wall; the transitions between the front end wall and the rear end wall of the outer frame wall and the inner side wall of the outer frame wall are all smooth transitions.
  • the middle frame is an integrally bent and formed polygonal frame structure; before bending, a bending notch is formed on the receiving plate, and the receiving plate and the outer frame wall are in the The bending gap is bent so that the middle frame forms a bending angle at the bending gap; the bending gap is V-shaped, and the tip of the bending gap faces the outer frame wall, and The tip of the bending notch is an arc transition.
  • the outer frame wall and the receiving plate are integrally formed by extrusion molding using plastic particles, and the extruded outer frame wall and the receiving plate are tempered at 60-80° C.;
  • the plastic particles are ABS plastic particles, and a filler material for reducing thermal expansion and contraction of the material is added to the plastic particles.
  • the rear side wall of the receiving plate is provided with installation grooves on both sides of the bending notch, and the installation grooves communicate with the bending notch;
  • the middle frame further includes corners Reinforcing sheet; after bending, the bending gap is closed to form a bending seam, and the two installation grooves are connected at an included angle; the corner reinforcing sheet is adapted to be installed in the two installation grooves connected at an included angle Inside.
  • the present application also provides a display device, the display device includes: a display panel; a middle frame, the middle frame includes an outer frame wall, a receiving plate and an appearance film that are integrally formed; the outer frame wall is located on a side of the display panel.
  • the receiving plate is protrudingly formed on the inner side wall of the outer frame wall; a border for installing the display panel is formed between the front side wall of the receiving plate and the inner side wall of the outer frame wall a step groove; a accommodating cavity is formed between the rear side wall of the receiving plate and the inner side wall of the outer frame wall; the appearance film is covered on the outer side wall of the outer frame wall;
  • the edge of the back plate is installed in the accommodating cavity.
  • the appearance film is made of a different plastic material from the outer frame wall and the receiving plate, and the appearance film, the outer frame wall and the receiving plate are extruded by mixed extrusion. Formed as one.
  • the front end of the appearance film extends and covers the front side wall of the outer frame wall.
  • the front end of the appearance film is protruded and arranged on the inner wall of the stepped groove, and covers at least part of the inner side wall of the outer frame wall.
  • the rear end of the appearance film extends and covers the rear side wall of the outer frame wall.
  • the rear end of the appearance film is protruded and arranged on the inner wall of the accommodating cavity, and covers at least part of the inner side wall of the outer frame wall.
  • the appearance film includes a first appearance part and a second appearance part that are integrally formed, the first appearance part and the second appearance part are arranged separately, and both are along the outer frame wall. lengthwise extension.
  • the first appearance part and the second appearance part are made of plastic materials of different colors, and are extruded into one body by means of mixing and co-extrusion.
  • a bending gap is formed on the receiving plate; the bending gap is V-shaped, and the tip of the bending gap faces the outer frame wall; after bending, The bending gaps are closed to form a bending seam, and a bending portion corresponding to the bending seam is formed on the outer frame wall.
  • the bending portion is heated, so that the receiving plate, the outer frame wall and the appearance film are smoothly bent at the bending notch.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • Fig. 2 is a kind of enlarged structural representation of A area among Fig. 1;
  • Fig. 3 is the exploded structure schematic diagram of Fig. 2;
  • Fig. 4 is the structural representation of the middle frame in Fig. 1;
  • Fig. 5 is the enlarged structural representation of B area among Fig. 3;
  • Fig. 6 is the front view of Fig. 4;
  • Fig. 7 is the enlarged structural representation of C area in Fig. 6;
  • Fig. 8 is the structural schematic diagram of Fig. 4 under another viewing angle
  • Fig. 9 is the enlarged structural representation of D area in Fig. 8.
  • Fig. 10 is the exploded structure schematic diagram of Fig. 9;
  • Fig. 11 is the structural representation of removing the corner reinforcing sheet in Fig. 10;
  • Fig. 12 is the structural representation of the middle frame of Fig. 8 before bending
  • Fig. 13 is the front view of Fig. 12;
  • Figure 14 is an enlarged schematic view of the E region in Figure 13;
  • FIG. 15 is a schematic structural diagram of FIG. 12 from another viewing angle
  • Fig. 16 is another kind of enlarged structure schematic diagram of A area in Fig. 1;
  • Figure 17 is a schematic cross-sectional view of the middle frame in Figure 1;
  • FIG. 18 is a schematic structural diagram of the first embodiment of the appearance film in FIG. 17;
  • FIG. 19 is a schematic structural diagram of the second embodiment of the appearance film in FIG. 17;
  • Figure 20 is a schematic structural diagram of the third embodiment of the appearance film in Figure 17;
  • Figure 21 is a schematic structural diagram of the fourth embodiment of the appearance film in Figure 17;
  • Figure 22 is a schematic structural diagram of the fifth embodiment of the appearance film in Figure 17;
  • Figure 23 is a schematic structural diagram of the sixth embodiment of the appearance film in Figure 17;
  • Figure 24 is a schematic structural diagram of the middle frame in Figure 16 before bending
  • Figure 25 is a front view of Figure 24;
  • Figure 26 is a schematic structural diagram of the middle frame of Figure 24 after bending
  • Figure 27 is an enlarged schematic view of the B region in Figure 26;
  • Fig. 28 is the exploded structure schematic diagram of Fig. 27;
  • Fig. 29 is the structural representation of removing the corner reinforcement sheet in 28;
  • FIG. 30 is a schematic structural diagram of another embodiment of FIG. 29.
  • Figure 31 is a schematic cross-sectional view of the corner reinforcing sheet in Figure 28 under another embodiment
  • Figure 32 is a schematic cross-sectional view of the corner reinforcing sheet welded on the middle frame in Figure 31;
  • Figure 33 is a schematic cross-sectional view of the corner reinforcing sheet in Figure 28 under yet another embodiment
  • Figure 34 is a schematic cross-sectional view of the corner reinforcing sheet punched on the middle frame in Figure 33;
  • FIG. 35 is a schematic view of the structure of FIG. 34 with the corner reinforcing pieces removed.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • Liquid crystal displays are one of the main types of display devices, which are widely used in electronic equipment.
  • the liquid crystal display includes a backlight, a liquid crystal panel, a middle frame, and the like.
  • the middle frame is mainly used to support the liquid crystal panel, the limiting optical film and the diffusion plate.
  • the middle frame is generally integrally injection-molded with an injection mold, which is very expensive and requires a large investment in product development.
  • middle frame structures that use extrusion molds instead of injection molds, but due to process limitations, their structures still have some shortcomings.
  • orientation expressions of up, down, left, right, front and rear in this document are all based on the state of the display device when it is in use.
  • the screen of the display device ie, the display surface of the panel
  • the opposite direction is the rear.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • FIG. 2 is an enlarged schematic view of the structure of the area A in FIG. 1 .
  • FIG. 3 is a schematic diagram of the exploded structure of FIG. 2 .
  • the display device provided by the embodiment of the present application mainly includes a display panel 1 , a middle frame 2 and a back plate 3 .
  • the display panel 1 is located on the front side of the display device, and the front side of the display panel 1 is used as a display surface for displaying images.
  • the display device may not be limited to electronic products such as televisions, computer monitors, and digital photo frames.
  • the back panel 3 is located on the rear side of the display device.
  • the back plate 3 is arranged at the rear side of the display panel 1 at intervals, and can be used for fixing and supporting the display panel 1 .
  • the backplane 3 may be a metal backplane 3 or a plastic backplane 3 .
  • the back plate 3 includes a main body portion 31 , a wrapping edge 32 and a folding edge 33 which are integrally formed by bending.
  • the main body portion 31 is provided on the rear side of the display panel 1 at intervals.
  • the outline of the main body portion 31 is the same as that of the display panel 1 .
  • the main body portion 31 may have a planar plate-like structure, or a shell structure with the center protruding to the rear side.
  • the hemming 32 is formed on the periphery of the main body portion 31 , and the hemming 32 can be formed by bending forward and extending from the periphery of the main body portion 31 .
  • the hemming 33 is formed on the front side of the hemming 32 , and the hemming 33 can be formed by extending from the front edge of the hemming 32 to the center side of the back plate 3 .
  • the connecting portion between the main body portion 31 and the wrapping edge 32 and the connecting portion between the wrapping edge 32 and the folded edge 33 may adopt a smooth or smooth transition.
  • a U-shaped or C-shaped bending structure can be formed between the main body portion 31 , the wrapping edge 32 and the folding edge 33 . It can be understood that the bending structure of the main body portion 31 , the wrapping edge 32 and the folding edge 33 can be integrally formed by bending, or integrally formed by injection molding.
  • the middle frame 2 is located on the peripheral side of the display device, and is used to effectively seal and protect the peripheral sides of the display panel 1 and the back panel 3 .
  • the middle frame 2 can be used to connect the display panel 1 and the back panel 3 , so that the display panel 1 is fixed on the front side of the back panel 3 .
  • FIG. 4 is a schematic structural diagram of the middle frame 2 in FIG. 1 .
  • FIG. 5 is an enlarged schematic view of the structure of the B region in FIG. 4 .
  • FIG. 6 is a side view of FIG. 4 .
  • FIG. 7 is an enlarged schematic view of the structure of the C region in FIG. 6 .
  • the middle frame 2 includes an outer frame wall 21 , a receiving plate 22 , an inner frame wall 23 and a retaining rib 24 that are integrally connected.
  • the outer frame wall 21 may also be referred to as a side frame edge; the inner frame wall 23 may also be referred to as an inner side edge.
  • the outer frame wall 21 has a long strip-like structure and is attached to the peripheral edges of the display panel 1 and the back panel 3 .
  • the outer frame wall 21 extends to a certain length in the front-rear direction, so that the outer frame wall 21 can protect the peripheral sides of the display panel 1 and the back panel 3 at the same time.
  • the receiving plate 22 has a long plate-like structure.
  • the receiving plate 22 is protrudingly formed on the inner side wall of the outer frame wall 21.
  • the receiving plate 22 can be formed by protruding and extending from a part of the inner side wall of the outer frame wall 21 toward the center side of the display device. .
  • the front side of the receiving plate 22 serves as the receiving surface of the display panel 1 , that is, the periphery of the back surface of the display panel 1 is attached and fixed on the front side of the receiving plate 22 .
  • the front end of the outer frame wall 21 protrudes forward from the front side of the receiving plate 22 , so that the front end of the outer frame wall 21 and the front end of the receiving plate 22
  • a stepped groove 201 is formed between the front side walls.
  • the stepped groove 201 can be used for mounting the display panel 1 , so that the display panel 1 is accommodated in the stepped groove 201 , and the front end of the outer frame wall 21 can effectively protect the periphery of the display panel 1 .
  • the outer frame wall 21 and the receiving plate 22 can have a T-shaped structure, and the thickness of the front end of the outer frame wall 21 can represent the frame thickness of the display device. The smaller the thickness of the outer frame wall 21, the more narrow frame can be formed display device.
  • the front end of the outer frame wall 21 may be flush with the front side of the receiving plate 22 .
  • the outer frame wall 21 and the receiving plate 22 may have an L-shaped structure.
  • the peripheral edge of the display panel 1 can be attached to the receiving plate 22 and the front side of the outer frame wall 21 , and the peripheral edge of the display panel 1 can extend to the outer side wall of the outer frame wall 21 to form a frameless display device.
  • a first adhesive strip 7 is attached to the front side wall of the receiving plate 22 , and the periphery of the display panel 1 can be attached to the receiving plate 22 through the first adhesive strip 7 . on the front side wall.
  • the first adhesive strip 7 is sandwiched between the front side wall of the receiving plate 22 and the display panel 1.
  • the first adhesive strip 7 can not only play a role in bonding and fixing between the receiving plate 22 and the display panel 1, but also It can play a sealing role between the receiving plate 22 and the display panel 1, and can also play a buffering role between the receiving plate 22 and the display panel 1.
  • the first The adhesive strip 7 can effectively buffer and protect the display panel 1 .
  • the first adhesive strip 7 can be a double-sided foam tape.
  • the inner frame wall 23 is in the shape of a long strip, and the inner frame wall 23 is disposed on the inner side of the outer frame wall 21 at intervals.
  • the inner frame wall 23 can be bent and extended backward along the inner frame wall 23 of the receiving plate 22 , and a receiving cavity 202 is enclosed between the outer frame wall 21 , the receiving plate 22 and the inner frame wall 23 , and the receiving cavity 202 is used for fixing The edge of the backplane 3.
  • the folded edge 33 of the back panel 3 can be accommodated in the accommodating cavity 202 and attached to the rear side wall of the receiving panel 22 .
  • the wrapping edge 32 of the back plate 3 can be attached to the inner side wall of the outer frame wall 21 .
  • the edge of the display panel 1 passes through the receiving plate 22 and the folding
  • the sides 33 are attached to each other, which can increase the receiving area between the display panel 1 and the back panel 3 , and is beneficial to improve the connection stability between the display panel 1 and the back panel 3 .
  • the C-shaped or U-shaped bending structure of the main body 31 , the wrapping edge 32 and the folding edge 33 of the back panel 3 can be compressed and deformed in the front and rear directions of the display device, which is beneficial to enhance the buffering effect on the display panel 1 .
  • a second adhesive strip 8 is attached to the rear side wall of the receiving plate 22 , and the folded edge 33 of the back plate 3 can be attached through the second adhesive strip 8 on the rear side wall surface of the receiving plate 22 .
  • the second adhesive strip 8 is sandwiched between the rear side wall of the receiving plate 22 and the folded edge 33 , and the second adhesive strip 8 can be used for bonding and fixing between the receiving plate 22 and the folded edge 33 of the back plate 3 . It can also play a role of sealing between the receiving plate 22 and the back plate 3, and can also play a buffering role between the receiving plate 22 and the back plate 3.
  • the second adhesive strip 8 can further effectively buffer and protect the display panel 1 through the receiving plate 22 .
  • the second adhesive strip 8 can use VHB tape, that is, polyacrylate double-sided foam tape.
  • the VHB tape has strong adhesiveness, which can make the bonding between the back plate 3 and the middle frame 2 easier. Stablize.
  • the retaining rib 24 is in the form of a long strip.
  • the retaining rib 24 is arranged on the rear side of the receiving plate 22 at intervals, and can be bent along the rear side edge of the inner frame wall 23 in the direction of the outer frame wall 21 . extended formation.
  • the retaining rib 24 can clamp and fix the folded edge 33 in the accommodating cavity 202, so that the folded edge 33 of the back plate 3 can be kept in close contact with the receiving plate 22, thereby effectively clamping and fixing the edge of the back plate 3 to the middle frame.
  • the stability of the structure between the back panel 3 , the middle frame 2 and the display panel 1 is maintained.
  • the middle frame 2 and the back plate 3 can be connected and fixed without using snaps or screws, etc., which is beneficial to simplify the structure of the middle frame 2 of the display device, and is convenient for the middle frame 2 It is produced by extrusion molding, which is beneficial to reduce the cost of production and research and development.
  • the structural cooperation of the retaining rib 24 , the inner frame wall 23 , the receiving plate 22 and the outer frame wall 21 can simplify the structure of the middle frame 2 and enable the middle frame 2 and the back plate 3 to have a certain function of snap connection. It is no longer necessary to set up a complex buckle structure or other threaded connection structure on the middle frame 2. It only needs to cooperate with the second adhesive strip 8, and the folded edge 33 of the back plate 3 is clamped to the retaining rib 24 and the inner frame wall. 23.
  • use the second adhesive strip 8 to firmly bond the folded edge 33 to the rear side wall of the receiving plate 22, so that the middle frame 2
  • a stable connection structure is formed with the backplane 3 .
  • This structure can effectively ensure that the middle frame 2 is always adhered to the back plate 3 , and can effectively avoid the phenomenon that the middle frame 2 is everted due to the partial force of the middle frame 2 , which leads to the phenomenon of tape opening.
  • the outer side wall, the front end wall and the rear end wall of the outer frame wall 21 are covered with an appearance film 25 , and the appearance film 25 can be a PET film.
  • the thickness is 0.01-0.02mm.
  • the appearance film 25 can be covered with different effect film materials according to the requirements.
  • the appearance effects include but are not limited to imitation stainless steel high-gloss effect, imitation aluminum alloy sandblasting, wire drawing, secondary oxidation effect, wood grain, rock texture, 3D effect, etc.,
  • the appearance of the middle frame 2 is diversified, providing more choices for consumers to meet the needs of different consumers.
  • the front edge and rear edge of the appearance film 25 both partially protrude into and cover the inner side wall of the outer frame wall 21, and the protruding length can be between 0.2-0.5mm, so that the appearance film 25 has a
  • the edges of the upper and lower ends can be hidden in the gap between the outer frame wall 21 and the display panel 1 and in the gap between the outer frame wall 21 and the back panel 3 respectively, and will not be directly exposed to the air.
  • the film surface of the appearance film 25 does not appear at right angles.
  • the transition part is treated with an R angle, and the radius R1 of the transition part is between 0.2-0.5 mm, which can effectively reduce the probability of the appearance film 25 warping.
  • the transition portion between the front end wall and the rear end wall of the outer frame wall 21 and the outer side wall of the outer frame wall 21 may also adopt a smooth transition to perform R angle processing.
  • the middle frame 2 in this embodiment can be extruded at one time by using plastic particles through an extrusion die. And through the in-mold lamination process, while extruding the plastic shape material, the film coating effect of the appearance film 25 can be completed to form the film-coated plastic profile.
  • the extrusion coating process can specifically include: putting plastic particles (such as ABS particles) into the silo of the extrusion coating unit, and then installing the appearance film 25 (such as PET film) on the decorative film roller of the extrusion coating unit , start the extrusion laminating unit, and extrude plastic profiles of a specific cross-section through the mouth film set on the extrusion laminating unit. While extruding the plastic profile, it is compounded with the appearance film 25 to form a film-coated plastic profile.
  • plastic particles such as ABS particles
  • the appearance film 25 such as PET film
  • FIG. 8 is a schematic structural diagram of FIG. 4 from another viewing angle.
  • FIG. 9 is an enlarged schematic view of the structure of the D region in FIG. 8 .
  • FIG. 10 is a schematic diagram of the exploded structure of FIG. 9 .
  • FIG. 11 is a schematic view of the structure of FIG. 10 with the corner reinforcing sheet 26 removed.
  • FIG. 12 is a schematic structural diagram of the middle frame 2 of FIG. 8 before bending.
  • FIG. 13 is a front view of FIG. 12 .
  • FIG. 14 is an enlarged schematic view of the structure of the E region in FIG. 13 .
  • FIG. 15 is a schematic structural diagram of FIG. 12 from another viewing angle.
  • the middle frame 2 is a three-frame frame structure formed by bending as one piece.
  • the middle frame 2 can adopt a hot bending process, and the extruded profile is bent twice at right angles through a tooling die to form a U-shaped three-sided middle frame 2 structure.
  • a bending notch 221 is formed on the receiving plate 22 .
  • the bending notch 221 is V-shaped, and extends from the end of the receiving plate 22 away from the outer frame wall 21 to the side close to the outer frame wall 21; the tip of the V-shaped bending notch 221 faces the outer frame wall 21 and is bent
  • the tip of the notch 221 is an arc transition, and the radius R2 of the arc is between 0.5-2 mm, so that the receiving plate 22 can be smoothly bent at the tip of the bending notch 221 .
  • the receiving plate 22 and the outer frame wall 21 are bent at the bending notch 221 , so that the middle frame 2 forms a bending angle at the bending notch 221 .
  • the bending angle can be between 60° and 120°, and can be adjusted according to the contours of the display panel 1 and the back panel 3 . When the bending angle is 90°, a right-angle bending structure is formed.
  • the bending corner is the place with the weakest structural strength, and the interval can be used to keep a certain structural distance between the bending notch 221 and the outer frame wall 21, which can strengthen the strength of the bending corner after bending. Structural strength, so that the middle frame 2 can have sufficient structural strength at the bending corner.
  • the extruded ABS (acronym for Acrylonitrile Butadiene Styrene) plastic particles. Filling materials such as magnesium oxide and barium carbonate are added to the ABS plastic particles to reduce the thermal expansion and contraction of extruded profiles.
  • the modified ABS plastic particles are in a molten state in the profile plastic fluid, and the interior is in a stable state of free curling.
  • the stability and toughness of the profile can be improved, and the thermal expansion and cold shrinkage of the profile can be reduced, effectively preventing the middle frame 2 from cracking near the bend when it shrinks at low temperature, and effectively Avoid twisting of the sky side middle frame 2 during high temperature expansion.
  • the middle frame 2 further includes a corner reinforcing sheet 26 .
  • the corner reinforcing sheet 26 is a stamped and formed metal sheet, and the corner reinforcing sheet 26 has a V-shaped structure connected at an included angle, and the included angle of the V-shaped structure is between 60°-120°.
  • the included angle of the V-shaped structure is 90°.
  • the rear sidewall of the receiving plate 22 is provided with installation grooves 222 on both sides of the bending notch 221 , and both installation grooves 222 communicate with the bending notch 221 .
  • the bending notches 221 are closed to form a bending seam 220 , and the two installation grooves 222 are connected at an included angle, and the included angle between the two installation grooves 222 is in contact with the corner reinforcing piece 26 .
  • the corner reinforcing pieces 26 can be fitted and installed in the two installation grooves 222 connected at an included angle.
  • the rear side wall of the receiving plate 22 may also be partially provided with installation grooves 222, and the corner reinforcing sheet 26 can be directly fixed on the rear side wall of the receiving plate 22 at the bending position.
  • a stepped groove 201 for installing the display panel 1 is formed between the front side wall of the receiving plate 11 and the inner side wall of the outer frame wall 21 .
  • the middle frame 2 also includes an appearance film covering the outer side wall of the outer frame wall 21 .
  • the structure of the middle frame 2 is optimized, and the inner frame wall 23 cooperates with the outer frame wall 21 and the receiving plate 22 to form an accommodation cavity 202 , and the back plate is enclosed by the retaining ribs 24
  • the edge of 3 is clamped in the accommodating cavity 202 to achieve stable and reliable connection between the middle frame 2 and the back panel 3 , and maintain the stability of the structure between the back panel 3 , the middle frame 2 and the display panel 1 .
  • the connection and fixation between the middle frame 2 and the back plate 3 can be realized without the use of buckles or screws between the middle frame 2 and the back plate 3, which is beneficial to simplify the structure of the middle frame 2 in the display device, and is convenient for the middle frame 2. It is produced by extrusion molding, which is beneficial to reduce the cost of production and research and development.
  • the middle frame is generally integrally injection-molded with an injection mold.
  • This type of injection mold needs to be formed by a hot runner, which is very expensive, requires a large investment in product development, and takes a long time to develop.
  • middle frames that are prepared by metal stamping, bending and other processes. From a structural point of view, the metal middle frame is limited to the process, and its cross-section can only obtain a U-shaped or L-shaped structure, and it is impossible to set appropriate ribs to achieve the corresponding limit. bit or connection requirements.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • FIG. 16 is an enlarged schematic view of the structure of the area A in FIG. 1 .
  • FIG. 17 is a schematic cross-sectional view of the middle frame 2 in FIG. 1 .
  • the display device mainly includes a display panel 1 , a backplane 3 , a diffuser plate 4 , an optical film 5 , a reflector 6 and a middle frame 2 .
  • the display panel 1 is located on the front side of the display device, and the front side of the display panel 1 is a display surface for displaying images.
  • the display device may not be limited to electronic products such as televisions, computer monitors, and digital photo frames.
  • the backplane 3 is disposed on the backside of the display panel 1 at intervals.
  • the back plate 3 is used to provide installation space for components such as the display panel 1 , the diffuser plate 4 , the optical film 5 , the reflection plate 6 and the like, and to perform structural support.
  • a backlight source (not shown in the figure) is provided on the front side of the back panel 3 , and the backlight source is used for emitting light and emitting light to the display panel 1 , thereby realizing the image display function of the display panel 1 .
  • the diffuser plate 4 is arranged in parallel on the back side of the display panel 1 and is located between the display panel 1 and the back panel 3 .
  • the diffuser plate 4 has light diffusing properties, and can be made of materials with light diffusing properties.
  • the diffuser plate 4 is used to diffuse the light emitted by the backlight source, so that the light irradiated on the display panel 1 is more uniform. Therefore, the diffuser plate 4 cooperates with the backlight source to provide a uniform surface light source for the display panel 1 .
  • the optical film 5 is disposed on the light emitting surface of the diffuser plate 4 , that is, the optical film 5 is attached to the front side of the diffuser plate 4 .
  • the optical film 5 is used to further process the light shape of the light emitted by the light emitting surface of the diffuser plate 4 to achieve the purpose of homogenizing the surface light source.
  • the optical film 5 usually includes a multi-layer optical film 5 such as a diffuser, a light enhancement film, a prism sheet, etc., and the multi-layer optical film 5 can be laminated together.
  • the reflection plate 6 is provided on the front side of the back plate 3 and is arranged on the back side of the diffuser plate 4 at intervals.
  • the reflection plate 6 can reflect the light emitted from the backlight source and the light emitted by the diffuser plate 4, so as to improve the utilization rate of the light and make the light more uniform.
  • the middle frame 2 is located on the peripheral side of the display device, and is used to effectively seal and protect the peripheral sides of the display panel 1 and the back panel 3 .
  • the middle frame 2 is used to connect and fix the display panel 1 and the back panel 3 , so that components such as the diffuser plate 4 , the optical film 5 , and the reflector 6 can be fixed between the display panel 1 and the back panel 3 .
  • FIG. 18 is a schematic structural diagram of the first embodiment of the appearance film 25 in FIG. 17 .
  • the middle frame 2 includes an outer frame wall 21 , a receiving plate 22 , an inner frame wall 23 and an appearance film 25 which are integrally connected.
  • the receiving plate 22 can also be called a receiving wall;
  • the appearance film 25 can also be called an appearance layer.
  • the outer frame wall 21 is in the shape of a long strip, and is attached to one side of the display panel 1 and the back panel 3 , that is, on the outer side of the edge of the display panel 1 .
  • the outer frame wall 21 extends with a certain width in the front-rear direction of the display device, so that the outer frame wall 21 can protect the outer sides of the display panel 1 and the back panel 3 at the same time.
  • the receiving plate 22 has a long plate-like structure.
  • the receiving plate 22 is protrudingly formed on the inner side wall of the outer frame wall 21 . form.
  • the front side of the receiving plate 22 serves as the receiving surface of the display panel 1 , that is, the periphery of the back surface of the display panel 1 is attached and fixed on the front side of the receiving plate 22 .
  • the front end of the outer frame wall 21 protrudes forward from the front side of the receiving plate 22 , so that a stepped groove 201 is formed between the inner side wall of the outer frame wall 21 and the front side of the receiving plate 22 .
  • the stepped groove 201 can be used for mounting the display panel 1 , so that the display panel 1 is accommodated in the stepped groove 201 , and the front end of the outer frame wall 21 can effectively protect the periphery of the display panel 1 .
  • a first adhesive strip 7 is attached to the front side wall of the receiving plate 22 , and the periphery of the display panel 1 can be attached to the front side of the receiving plate 22 through the first adhesive strip 7 .
  • the first adhesive strip 7 is sandwiched between the front side wall of the receiving plate 22 and the display panel 1.
  • the first adhesive strip 7 can not only play a role in bonding and fixing between the receiving plate 22 and the display panel 1, but also It can play a role of sealing between the receiving plate 22 and the display panel 1 , and can also play a buffering role between the receiving plate 22 and the display panel 1 .
  • the first adhesive strip 7 can also be called a first adhesive tape, and the first adhesive strip 7 can be a double-sided foam tape.
  • the inner frame wall 23 has an elongated structure, and the inner frame wall 23 is arranged on the inner side of the outer frame wall 21 at intervals.
  • the inner frame wall 23 can be formed by bending the inner edge of the receiving plate 22 to extend backward.
  • the outer frame wall 21 , the receiving plate 22 and the inner frame wall 23 are surrounded by a accommodating cavity 202 , and the accommodating cavity 202 is used to fix the edge of the back plate 3 .
  • the accommodating cavity 202 may also be referred to as a accommodating groove.
  • the back plate 3 includes a main body portion 31 , a wrapping edge 32 and a folding edge 33 which are integrally formed by bending.
  • the wrapping edge 32 may also be referred to as a flanging edge.
  • the main body portion 31 is provided on the rear side of the display panel 1 at intervals. It should be noted that, the main body portion 31 may have a planar plate-like structure, or a shell structure with the center protruding to the rear side.
  • the hemming 32 is formed by bending and extending the periphery of the main body portion 31 to the front side.
  • the hemming 33 is formed by bending and extending the front edge of the hemming 32 toward the center side of the back plate 3 .
  • a U-shaped or C-shaped bending structure can be formed between the main body portion 31 , the wrapping edge 32 and the folding edge 33 .
  • the U-shaped or C-shaped bending structure is arranged in the accommodating cavity 202 .
  • the folded edge 33 can be attached to the rear side of the receiving plate 22 , and the wrapped edge 32 can be attached to the inner side wall of the outer frame wall 21 .
  • the edges of the diffuser plate 4 , the optical film 5 and the reflection plate 6 can extend into and be arranged inside the U-shaped or C-shaped bending structure.
  • a second adhesive strip 8 is attached to the rear side wall of the receiving plate 22 , and the folded edge 33 of the back plate 3 can be attached to the rear side wall surface of the receiving plate 22 through the second adhesive strip 8 superior.
  • the second adhesive strip 8 is sandwiched between the rear side wall of the receiving plate 22 and the folded edge 33 , and the second adhesive strip 8 can play the roles of bonding, fixing, sealing, buffering and the like.
  • the second adhesive strip 8 may also be referred to as a second adhesive tape.
  • the second adhesive strip 8 can use VHB tape, that is, polyacrylate double-sided foam tape.
  • the appearance film 25 is integrally formed and covers the outer side wall of the outer frame wall 21 , serving as the appearance surface of the middle frame 2 and the appearance surface of the peripheral side of the display device.
  • the appearance film 25 is used as an appearance surface, and its color can be adjusted according to requirements. It should be noted that the outer frame wall 21 , the receiving plate 22 and the inner frame wall 23 serve as the non-exterior surface of the middle frame 2 and are hidden between the exterior film 25 , the display panel 1 and the back panel 3 .
  • the appearance film 25 is integrally formed and covered on the front side of the outer frame wall 21 , and together with the display panel 1 can form the front side appearance surface of the display device.
  • the part of the appearance film 25 covering the front side of the outer frame wall 21 may be flush with the front surface of the display panel 1 .
  • the width of the front side of the outer frame wall 21 may also represent the frame width of the display surface of the display device. It can be understood that, the narrower the width of the front side of the outer frame wall 21 is, the more favorable it is to form a display device with a narrow frame.
  • the part of the appearance film 25 covering the front side of the outer frame wall 21 can also be arranged on the inner wall of the stepped groove 201 and cover part of the inner side wall of the outer frame wall 21 .
  • the part of the appearance film 25 covered on the front side and the inner side of the outer frame wall 21 can form a bending structure, so that the front end of the appearance film 25 can be hidden in the stepped groove 201, which can effectively prevent the front end of the appearance film 25 from being warped.
  • the appearance film 25 can completely cover the inner side wall of the outer frame wall 21 belonging to the stepped groove 201 .
  • the appearance film 25 is integrally formed and covered on the rear side of the outer frame wall 21 , and together with the back plate 3 , can form the rear appearance surface of the display device.
  • the part of the appearance film 25 covering the front side of the outer frame wall 21 can also be arranged on the inner wall of the accommodating cavity 202 and cover part of the inner side wall of the outer frame wall 21 .
  • the part of the appearance film 25 covered on the back and inner side of the outer frame wall 21 can form a bending structure, so that the rear end of the appearance film 25 can be hidden in the accommodating cavity 202, which can effectively prevent the rear end of the appearance film 25 from being warped. Phenomenon. It can be understood that the appearance film 25 can completely cover the inner side wall of the outer frame wall 21 belonging to the accommodating cavity 202 .
  • the outer frame wall 21 , the receiving plate 22 , the inner frame wall 23 and the appearance film 25 in the middle frame 2 are all elongated structures, and tapes are used between the middle frame 2 and the display panel 1 and the back plate 3
  • the outer frame wall 21 , the receiving plate 22 , the inner frame wall 23 and the appearance film 25 have smooth surfaces and no complicated structure, so it is beneficial to simplify the structure of the middle frame 2 of the display device, and it is convenient for the middle frame 2 to use plastic particles through extrusion.
  • the one-time extrusion molding of the plastic mold is beneficial to reduce the cost of production and research and development.
  • the plastic particles used in the appearance film 25 as the appearance surface are different in material and color from the plastic particles used in the outer frame wall 21, the receiving plate 22, and the inner frame wall 23 as the non-design surface.
  • the non-design surface adopts ABS particles
  • the appearance surface is made of acrylic.
  • the plastic granules of the two materials are extruded at one time to form a long plastic profile by a mixed co-extrusion process.
  • the mixing extrusion process can specifically include: putting the plastic-modified ABS particles and the acrylic particles as the appearance surface into the respective silos of the extrusion coating unit, starting the extrusion coating unit, and setting the extrusion coating unit by setting the extrusion coating. Oral film on the unit, extruding plastic profiles with specific cross-sections. While extruding the plastic profile, the two are integrally formed together.
  • modified ABS and acrylic are plastic fluids in molten state at 180 °C, and the interior is in a free curling stable state. After extrusion through the die of the extruder, they are in a metastable state. Tempering at ⁇ 80°C to improve dimensional stability.
  • the preferred embodiment of the present application mainly prefers plastic ABS as the material for the non-appearance surface selection, and acrylic as the appearance surface selection, but the plastic raw materials of the middle frame 2 are not limited to these two, for example, PC/ABS, PC/ ABS+GF10, PP (polypropylene, polypropylene) or other plastic raw materials, of which PC/ABS, polycarbonate and acrylonitrile-butadiene-styrene copolymers and mixtures are made of polycarbonate (Polycarbonate) and polystyrene.
  • FIG. 19 is a schematic structural diagram of the second embodiment of the appearance film 25 in FIG. 17 .
  • the appearance film 25 includes a first appearance part 251 and a second appearance part 252 which are integrally formed.
  • the first appearance portion 251 and the second appearance portion 252 are arranged in a front-to-back space, and both extend along the length direction of the outer frame wall 21 .
  • the first appearance part 251 and the second appearance part 252 can be made of acrylic plastic particles of different colors, so as to enrich the appearance effect of the appearance film 25 .
  • the first appearance part 251 and the second appearance part 252 are put into the silos of the respective extrusion lamination units, heated, melted, and extruded in their respective mold channels, and finally merged and merged with the non-extrusion film.
  • the ABS on the exterior surface is extruded in one piece.
  • FIG. 20 is a schematic structural diagram of the third embodiment of the appearance film 25 in FIG. 17 .
  • the appearance film 25 also includes a first appearance part 251 and a second appearance part 252 that are integrally formed.
  • the difference from the embodiment in FIG. 19 is that the second appearance parts 252 are distributed in the middle of the first appearance part 251 , and the second appearance part 252 separates the first appearance part 251 into two parts spaced back and forth.
  • the second appearance portion 252 may be provided at the position of the outer side wall of the outer frame wall 21 , or may be provided at the position of the front side wall or the rear side wall of the outer frame wall 21 .
  • FIG. 21 is a schematic structural diagram of the fourth embodiment of the appearance film 25 in FIG. 17 .
  • the appearance film 25 includes a first appearance part 251 , a second appearance part 252 and a third appearance part 253 which are integrally formed.
  • the first appearance part 251 , the second appearance part 252 and the third appearance part 253 use acrylic plastic particles of different colors, so as to enrich the appearance effect of the appearance film 25 .
  • the first appearance portion 251 , the second appearance portion 252 and the third appearance portion 253 are arranged in a spaced manner, and all extend along the length direction of the outer frame wall 21 .
  • the second appearance parts 252 are distributed in the middle of the first appearance part 251 , and the second appearance parts 252 divide the first appearance part 251 into two parts at a front and rear interval.
  • the third appearance parts 253 are distributed in the middle of the second appearance part 252 , and the third appearance part 253 separates the second appearance part 252 into two parts that are spaced back and forth.
  • FIG. 22 is a schematic structural diagram of the fifth embodiment of the appearance film 25 in FIG. 17 .
  • the appearance film 25 includes a first appearance part 251 , a second appearance part 252 and a third appearance part 253 which are integrally formed.
  • the difference from the embodiment in FIG. 21 is that the third appearance part 253 and the second appearance part 252 are arranged at a front and rear interval, and the second appearance part 252 and the third appearance part 253 separate the first appearance part 251 at a front, middle and rear space. Arranged in three parts.
  • FIG. 23 is a schematic structural diagram of the sixth embodiment of the appearance film 25 in FIG. 17 .
  • the appearance film 25 includes a first appearance part 251 , a second appearance part 252 and a third appearance part 253 which are integrally formed.
  • the difference from the embodiment shown in FIG. 21 is that the first appearance part 251 , the second appearance part 252 and the third appearance part 253 are arranged in a front, middle, and rear in order.
  • FIG. 24 is a schematic structural diagram of the middle frame 2 in FIG. 16 before bending.
  • FIG. 25 is a front view of FIG. 24 .
  • FIG. 26 is a schematic structural diagram of the middle frame 2 of FIG. 24 after bending.
  • the middle frame 2 is a three-frame frame structure formed by integral bending.
  • the middle frame 2 adopts a hot bending process, and the extruded profile is bent twice at right angles through a tooling die to form a U-shaped three-frame structure.
  • the three-frame structure of the middle frame 2 is arranged on the left and right sides and the sky side of the display panel 1 respectively.
  • the receiving plate 22 Before bending, the receiving plate 22 is provided with a bending notch 221 .
  • the bending notch 221 is V-shaped and extends from one end of the receiving plate 22 away from the outer frame wall 21 to the side close to the outer frame wall 21 .
  • the tip of the V-shaped bending notch 221 faces the outer frame wall 21 , and the tip of the bending notch 221 is an arc transition. bend smoothly at the tip.
  • the bending notches 221 are closed to form a bending seam 220 , and a bending portion corresponding to the bending seam 220 is formed on the outer frame wall 21 and the appearance film 25 .
  • FIG. 27 is an enlarged schematic view of the structure of the B region in FIG. 26 .
  • FIG. 28 is a schematic diagram of the exploded structure of FIG. 27 .
  • FIG. 29 is a schematic view of the structure of FIG. 28 with the corner reinforcing sheet 26 removed.
  • a corner reinforcing piece 26 is provided at the bending connection of the middle frame 2 .
  • the corner reinforcing pieces 26 are used to fix and strengthen the structure of the middle frame 2 at the bend.
  • the corner reinforcing sheet 26 is a stamped metal sheet, and the corner reinforcing sheet 26 has a V-shaped or L-shaped structure connected at an included angle, and the included angle of the V-shaped or L-shaped structure is between 60°-120°.
  • the included angle of the V-shaped or L-shaped structure is 90°.
  • the rear sidewall of the receiving plate 22 is provided with installation grooves 222 on both sides of the bending notch 221 , and the two installation grooves 222 are both communicated with the bending notch 221 .
  • the bending notches 221 are closed to form a bending seam 220, and the two installation grooves 222 are connected at an included angle. It can be fitted and installed in two installation grooves 222 connected at an angle.
  • the corner reinforcing sheet 26 can be directly attached to the installation groove 222 by using glue.
  • the mounting groove 222 may not be provided on the rear side wall of the receiving plate 22 , and the corner reinforcing sheet 26 can be directly pasted on the rear side wall of the bending portion of the receiving plate 22 .
  • FIG. 30 is a schematic structural diagram of another embodiment of FIG. 29 .
  • the corner reinforcing sheet 26 may not be provided on the rear side wall of the receiving plate 22 , and a welding seam may be formed at the bending seam 220 directly through the ultrasonic welding process.
  • FIG. 31 is a schematic cross-sectional view of the corner reinforcing piece 26 in FIG. 28 under another embodiment.
  • FIG. 32 is a schematic cross-sectional view of the corner reinforcing piece 26 welded to the middle frame 2 in FIG. 31 .
  • a plurality of ridges 261 are formed on the side wall of the corner reinforcing sheet 26 facing the receiving plate 22 , the ridges 261 are strip-shaped, and the plurality of ridges 261 are parallel spaced arrangement.
  • the corner reinforcing sheet 26 is welded together with the bending portion of the middle frame 2 by ultrasonic welding.
  • FIG. 33 is a schematic cross-sectional view of the corner reinforcing piece 26 in FIG. 28 under still another embodiment.
  • FIG. 34 is a schematic cross-sectional view of the corner reinforcing piece 26 punched on the middle frame 2 in FIG. 33 .
  • FIG. 35 is a schematic view of the structure of FIG. 34 with the corner reinforcing sheet 26 removed.
  • a plurality of connecting pipes 262 are protruded on the side wall of the corner reinforcing sheet 26 facing the receiving plate 22 , and the connecting pipes 262 are structured. Meanwhile, through holes 223 corresponding to the connecting pipes 262 are respectively provided on both sides of the bending notch 221 of the receiving plate 22 .
  • the plurality of connecting tubes 262 on the corner reinforcing piece 26 are inserted into the through holes 223 of the receiving plate 22 in a one-to-one correspondence.
  • the corner reinforcing sheet 26 is punched to compress and deform the connecting pipe 262 , and the corner reinforcing sheet 26 and the bent portion of the receiving plate 22 are punched into one piece.
  • Using the stamping process instead of the gluing process can save the curing time of the glue, which is beneficial to improve the reliability of the middle frame 2 at the bending corner.
  • the structural cooperation between the outer frame wall 21 of the middle frame 2 and the receiving plate 22 is used to form a stepped groove 201 and an accommodating cavity 202 on the front and rear sides of the receiving plate 22, so that the display panel 1 and the back
  • the plates 3 can be respectively fixed on the front and rear sides of the receiving plate 22 , which solves the problem of connection and fixing of the middle frame 2 , the display panel 1 and the back plate 3 .
  • the appearance film 25 is integrally formed and covered on the outer side wall of the outer frame wall 21 as the appearance surface of the peripheral side of the display device, thereby enriching and optimizing the appearance effect of the middle frame 2 to meet the appearance requirements of different consumers .

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Abstract

一种显示装置，包括中框（2）、显示面板（1）及背板（3）。中框（2）包括外框壁（21）、承接板（22）、内框壁（23）及挡筋（24）；承接板（22）凸设形成于外框壁（21）的内侧壁上；内框壁（23）由承接板（22）的内侧边沿向后弯折延伸；挡筋（24）由内框壁（23）的后侧边沿向外框壁（21）方向弯折延伸；内框壁（23）、承接板（22）及外框壁（21）之间围成有容纳腔（202）；显示面板（1）位于中框（2）的前侧；背板（3）位于中框（2）的后侧，且挡筋（24）将背板（3）的边沿夹设于容纳腔（202）内。利用内框壁（23）、外框壁（21）及承接板（22）配合围成容纳腔（202），并通过挡筋（24）将背板（3）的边沿夹设于在容纳腔（202）内，以实现中框（2）与背板（3）之间的稳定可靠连接。

Description

显示装置
相关申请的交叉引用
本申请要求在2021年02月05日提交、申请号为202110164550.7、申请名称为“显示装置”的中国专利申请，在2021年08月23日提交、申请号为202110970511.6、申请名称为“显示装置”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。
技术领域
本申请涉及显示设备技术领域，特别涉及一种显示装置。
背景技术
液晶显示器是显示装置的主要类型之一，其在电子设备中得到了广泛的应用。液晶显示器包含背光、液晶面板和中框等。其中，中框主要用于支撑液晶面板、限位光学膜片及扩散板等。
相关技术的中框一般采用注塑模具一体注塑成型，这种注塑模具成本十分高昂，产品开发投入较大。也有一些采用挤塑模具代替注塑模具成型的中框结构，但限于工艺限制，其结构仍存在一些不足。
发明内容
本申请提供一种显示装置，该显示装置包括：中框，包括一体连接的外框壁、承接板、内框壁及挡筋；所述承接板凸设形成于所述外框壁的内侧壁上；所述内框壁由所述承接板的内框壁沿向后弯折延伸；所述挡筋由所述内框壁的后侧边沿向所述外框壁的方向弯折延伸；所述内框壁、承接板及外框壁之间围成有容纳腔；显示面板，位于所述中框的前侧，并贴设于所述承接板的前侧壁上；及背板，位于所述中框的后侧，且所述挡筋将所述背板的边沿夹设于所述容纳腔内。
根据本申请一些实施例，所述背板的周沿形成有向前延伸的包边，所述包边的前侧边沿向所述背板的中心侧延伸形成有折边；所述包边贴设于所述外框壁的内侧壁上；所述折边贴设于所述承接板的后侧壁上，并夹设于所述容纳腔内。
根据本申请一些实施例，所述折边与所述承接板的后侧壁之间贴设有第一粘接条。
根据本申请一些实施例，所述承接板的前侧壁与所述显示面板之间贴设有第二粘接条。
根据本申请一些实施例，所述外框壁的前端部与所述承接板的前侧壁之间形成有台阶槽，所述显示面板装设于所述台阶槽内。
根据本申请一些实施例，所述外框壁的外侧壁、前端壁及后端壁均包覆有外观膜；所述外观膜的前端边沿和后端边沿均部分伸入并包覆在所述外框壁的内侧壁上；所述外框壁的前端壁和后端壁与所述外框壁的内侧壁之间的过渡部均为圆滑过渡。
根据本申请一些实施例，所述中框为一体折弯成型的多边框架结构；在折弯前，所述承接板上开设有折弯缺口，所述承接板和所述外框壁在所述折弯缺口处进行弯折，以使所述中框在所述折弯缺口处形成折弯角；所述折弯缺口呈V字形，所述折弯缺口的尖端朝向所述外框壁，且所述折弯缺口的尖端为圆弧过渡。
根据本申请一些实施例，所述折弯缺口的尖端与所述外框壁之间具有间隔。
根据本申请一些实施例，所述外框壁和所述承接板采用塑料粒子通过挤塑一体成型，所述挤塑成型后的外框壁和承接板经过回火60-80℃处理；所述塑料粒子为ABS塑料颗粒，且所述塑料粒子中添加有用于降低材料热胀冷缩量的填充材料。
根据本申请一些实施例，所述承接板的后侧壁上于所述折弯缺口的两侧开设有安装槽，所述安装槽与所述折弯缺口连通；所述中框还包括角部加强片；在折弯后，所述折弯缺口合拢形成折弯缝，且两所述安装槽呈夹角相连；所述角部加强片适配安装于呈夹角相连的 两所述安装槽内。
本申请还提供一种显示装置，该显示装置包括：显示面板；中框，所述中框包括一体成型的外框壁、承接板和外观膜；所述外框壁位于所述显示面板的一侧；所述承接板凸设形成于所述外框壁的内侧壁上；所述承接板的前侧壁与所述外框壁的内侧壁之间形成有用于装设所述显示面板的边沿的台阶槽；所述承接板的后侧壁与所述外框壁的内侧壁之间形成有容纳腔；所述外观膜覆盖在所述外框壁的外侧壁上；及背板，设于所述显示面板的背侧，所述背板的边沿装设于所述容纳腔内。
本申请一些实施例，所述外观膜采用与所述外框壁及所述承接板不同的塑料材质，所述外观膜与所述外框壁及所述承接板采用混合挤塑的方式挤出成型为一体。
本申请一些实施例，所述外观膜的前端延伸并覆盖在所述外框壁的前侧壁上。
本申请一些实施例，所述外观膜的前端伸入布置于所述台阶槽的内壁上，并至少覆盖所述外框壁的部分内侧壁。
本申请一些实施例，所述外观膜的后端延伸并覆盖在所述外框壁的后侧壁上。
本申请一些实施例，所述外观膜的后端伸入布置于所述容纳腔的内壁上，并至少覆盖所述外框壁的部分内侧壁。
本申请一些实施例，所述外观膜包括一体成型的第一外观部和第二外观部，所述第一外观部与所述第二外观部呈分隔布置，并均沿所述外框壁的长度方向延伸。
本申请一些实施例，所述第一外观部与所述第二外观部采用不同颜色的塑料材质，并采用混合共挤的方式挤出成型为一体。
本申请一些实施例，在折弯前，所述承接板上开设有折弯缺口；所述折弯缺口呈V字形，所述折弯缺口的尖端朝向所述外框壁；在折弯后，所述折弯缺口合拢形成折弯缝，所述外框壁上形成与所述折弯缝相对应的折弯部。
本申请一些实施例，在折弯时，对所述折弯部处进行加热，以使所述承接板、所述外框壁及所述外观膜在折弯缺口处顺利弯折。
附图说明
图1是本申请一实施例的显示装置的结构示意图；
图2是图1中A区域的一种放大结构示意图；
图3是图2的分解结构示意图；
图4是图1中的中框的结构示意图；
图5是图3中B区域的放大结构示意图；
图6是图4的正视图；
图7是图6中C区域的放大结构示意图；
图8是图4在另一视角下的结构示意图；
图9是图8中D区域的放大结构示意图；
图10是图9的分解结构示意图；
图11是图10中去掉角部加强片的结构示意图；
图12是图8的中框在弯折前的结构示意图；
图13是图12的正视图；
图14是图13中E区域的放大结构示意图；
图15是图12在另一视角下的结构示意图；
图16是图1中A区域的另一种放大结构示意图；
图17是图1中的中框的剖面示意图；
图18是图17中外观膜的第一实施例的结构示意图；
图19是图17中外观膜的第二实施例的结构示意图；
图20是图17中外观膜的第三实施例的结构示意图；
图21是图17中外观膜的第四实施例的结构示意图；
图22是图17中外观膜的第五实施例的结构示意图；
图23是图17中外观膜的第六实施例的结构示意图；
图24是图16中的中框在折弯前的结构示意图；
图25是图24的正视图；
图26是图24的中框在折弯后的结构示意图；
图27是图26中B区域的放大结构示意图；
图28是图27的分解结构示意图；
图29是28中去掉角部加强片的结构示意图；
图30是图29的另一实施例的结构示意图；
图31是图28中角部加强片在另一实施例下的剖面示意图；
图32是图31中角部加强片焊接在中框上的剖面示意图；
图33是图28中角部加强片在又一实施例下的剖面示意图；
图34是图33中角部加强片冲压在中框上的剖面示意图；
图35是图34中去掉角部加强片的结构示意图。
附图标记说明如下：
1、显示面板；2、中框；21、外框壁；22、承接板；23、内框壁；24、挡筋；25、外观膜；26、角部加强片；201、台阶槽；202、容纳腔；220、折弯缝；221、折弯缺口；222、安装槽；223、通孔；251、第一外观部；252、第二外观部；253、第三外观部；261、凸纹；262、连接管；3、背板；31、主体部；32、包边；33、折边；4、扩散板；5、光学膜片；6、反射板；7、第一粘接条；8、第二粘接条。
具体实施方式
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
在本申请的描述中，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”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
液晶显示器是显示装置的主要类型之一，其在电子设备中得到了广泛的应用。液晶显示器包含背光、液晶面板和中框等。其中，中框主要用于支撑液晶面板、限位光学膜片及扩散板等。
相关技术中，中框一般采用注塑模具一体注塑成型，这种注塑模具成本十分高昂，产品开发投入较大。也有一些采用挤塑模具代替注塑模具成型的中框结构，但限于工艺限制，其结构仍存在一些不足。
为便于表述，如无特殊说明，本文对于上、下、左、右、前、后的方位表述均以显示装置使用时的状态为参考。显示装置的屏幕(即面板的显示面)为前，相背的方向即为后。
图1是本申请一实施例的显示装置的结构示意图。图2是图1中A区域的放大结构示意图。图3是图2的分解结构示意图。
请参阅图1至图3，本申请实施例提供的显示装置主要包括显示面板1、中框2和背板3。
在显示装置中，显示面板1位于显示装置的前侧，显示面板1的前侧面作为显示面， 用以显示图像。该显示装置可以不限于电视机、电脑显示器、数码相框等电子产品。
背板3位于显示装置的后侧面。背板3间隔地设置于显示面板1的后侧，可用于固定和支撑显示面板1。可以理解的是，背板3可以是金属背板3，也可以是塑料背板3。
在一些实施例中，背板3包括一体弯折成型的主体部31、包边32和折边33。
主体部31间隔地设于显示面板1的后侧。主体部31的轮廓与显示面板1相同。需要说明的是，主体部31可呈平面的板状结构，或中心向后侧凸设的壳体结构。
包边32形成于主体部31的周沿，包边32可由主体部31的周沿向前弯折并延伸形成。
折边33形成于包边32的前侧，折边33可由包边32的前侧边沿向背板3的中心侧延伸形成。
主体部31与包边32之间的衔接部以及包边32与折边33之间的衔接部均可采用圆滑或平滑过渡。主体部31、包边32及折边33之间可形成U型或C型弯折结构。可以理解的是，主体部31、包边32及折边33的弯折结构，可通过一体弯折成型，也可以通过整体注塑成型。
中框2位于显示装置的周侧，用于对显示面板1及背板3的周侧进行有效地封闭和防护。中框2可用于连接显示面板1和背板3，使显示面板1固定在背板3的前侧。
图4是图1中的中框2的结构示意图。图5是图4中B区域的放大结构示意图。图6是图4的一侧视图。图7是图6中C区域的放大结构示意图。
请参阅图1至图7，中框2包括一体连接的外框壁21、承接板22、内框壁23及挡筋24。其中，外框壁21也可以称为侧框边；内框壁23也可以称为内侧边。
外框壁21呈长条状结构，并贴设在显示面板1和背板3的周侧边沿。外框壁21在前后方向上延伸有一定长度，以使外框壁21能够同时防护在显示面板1和背板3的周侧。
承接板22呈长条型的板状结构，承接板22凸设形成于外框壁21的内侧壁上，承接板22可由外框壁21的部分内侧壁向显示装置的中心侧凸出延伸形成。
承接板22的前侧面作为显示面板1的承接面，即显示面板1背面的周沿贴设固定在承接板22的前侧面上。
请参阅图2、图5及图7，在一些实施例中，外框壁21的前端部向前凸伸出承接板22的前侧面，以使外框壁21的前端部与承接板22的前侧壁之间形成有台阶槽201。该台阶槽201可供显示面板1进行贴装，使显示面板1收容在该台阶槽201内，外框壁21的前端部可对显示面板1的周沿进行有效地防护。此时，外框壁21与承接板22可呈T字型结构，外框壁21的前端部的厚度可代表显示装置的边框厚度，外框壁21的厚度越小，可形成超窄边框的显示装置。
在一些实施例中，外框壁21的前端部可与承接板22的前侧面相平。此时，外框壁21与承接板22可呈L字型结构。显示面板1的周沿可贴设在承接板22和外框壁21的前侧面上，显示面板1的周沿可延伸至外框壁21的外侧壁，以形成无边框的显示装置。
请参阅图1，在一些实施例中，承接板22的前侧壁上贴设有第一粘接条7，显示面板1的周沿可通过该第一粘接条7贴设在承接板22的前侧壁面上。第一粘接条7夹设在承接板22的前侧壁与显示面板1之间，第一粘接条7既可以在承接板22与显示面板1之间起到粘接固定的作用，又可以在承接板22与显示面板1之间起到密封的作用，还可以在承接板22与显示面板1之间起到缓冲的作用，当显示面板1收到前后方向的挤压时，第一粘接条7可对显示面板1进行有效地缓冲防护。在一些实施例中，第一粘接条7可采用泡棉双面胶带。
请参阅图2至图7，内框壁23呈长条状结构，内框壁23间隔地设于外框壁21的内侧。内框壁23可由承接板22的内框壁23沿向后弯折延伸，并在外框壁21、承接板22及内框壁23之间围成有容纳腔202，该容纳腔202用于固定背板3的边沿。
当中框2安装在背板3的边沿时，背板3的折边33能够收容于该容纳腔202内，并贴设在承接板22的后侧壁上。背板3的包边32能够贴设在外框壁21的内侧壁上。此时， 显示面板1的边沿通过承接板22与折
边33相贴，能够提高显示面板1与背板3之间的承接面积，有利于提高显示面板1与背板3之间的连接稳定性。同时，背板3的主体部31、包边32及折边33的C型或U型弯折结构，能够在显示装置的前后方向上进行压缩变形，有利于增强对显示面板1的缓冲作用。
请参阅图1至图3，在一些实施例中，承接板22的后侧壁上贴设有第二粘接条8，背板3的折边33可通过该第二粘接条8贴设在承接板22的后侧壁面上。第二粘接条8夹设在承接板22的后侧壁与折边33之间，第二粘接条8既可以在承接板22与背板3的折边33之间起到粘接固定的作用，又可以在承接板22与背板3之间起到密封的作用，还可以在承接板22与背板3之间起到缓冲的作用，当显示面板1收到前后方向的挤压时，第二粘接条8可通过承接板22进一步地对显示面板1进行有效地缓冲防护。在一些实施例中，第二粘接条8可采用VHB胶带，即聚丙烯酸酯双面泡绵胶带，VHB胶带具有很强的粘性，能够使背板3与中框2之间的粘接更加稳定。
仍请参阅图2至图7，挡筋24呈长条状结构，挡筋24间隔地设于承接板22的后侧，并可由内框壁23的后侧边沿向外框壁21方向弯折延伸形成。挡筋24可将折边33夹持固定在容纳腔202内，使背板3的折边33保持与承接板22的贴合固定，从而有效地将背板3的边沿夹持固定在中框2的容纳腔202内，保持背板3、中框2及显示面板1之间结构的稳定性。中框2与背板3之间无需采用卡扣或螺钉等方式，即可实现中框2与背板3之间的连接固定，有利于简化显示装置的中框2的结构，便于中框2采用挤塑成型的方式进行制作，有利于降低生产和研发的成本。
挡筋24、内框壁23、承接板22及外框壁21的结构配合，能够简化中框2的结构，并使中框2与背板3之间具有一定卡扣连接的功能。无需再在中框2上设置复杂的卡扣结构，或其他螺纹连接结构等，只需与第二粘接条8配合，在背板3的折边33卡接在挡筋24、内框壁23、承接板22及外框壁21之间的容纳腔202内时，利用第二粘接条8将折边33牢固地粘接在承接板22的后侧壁上，即可使中框2与背板3之间形成稳定的连接结构。这种结构能够有效地保证中框2始终粘接在背板3上，可有效地避免因中框2的局部受力而产生外翻，导致胶带开胶的现象。
请参阅图1至图7，在一些实施例中，外框壁21的外侧壁、前端壁及后端壁均包覆有外观膜25，该外观膜25可采用PET覆膜，PET覆膜的厚度为0.01-0.02mm。该外观膜25可以根据需求覆不同效果的外观效果膜材，外观效果包括但不限于仿不锈钢高光效果、仿铝合金喷砂、拉丝、二次氧化效果、木纹、岩石纹理、3D效果等，使得中框2的外观多样化，可供消费者更多的选择空间，以满足不同消费者的需求。
请参阅图7，外观膜25的前端边沿和后端边沿均部分伸入并包覆在外框壁21的内侧壁上，伸入的长度可在0.2-0.5mm之间，以使外观膜25的上下两端部的边沿能够分别隐藏在外框壁21与显示面板1的间隙内和外框壁21与背板3的间隙内，而不会直接暴露在空气中。
为使外观膜25平稳过渡，外观膜25的膜面不出现直角，在一些实施例中，外框壁21的前端壁和后端壁与外框壁21的内侧壁之间的过渡部均为圆滑过渡，该过渡部采用R角处理，过渡部的半径R1在0.2-0.5mm之间，进而可有效地降低外观膜25起翘的概率。可以理解的是，外框壁21的前端壁和后端壁与外框壁21的外侧壁之间的过渡部也可以采用圆滑过渡，进行R角处理。
基于中框2中外框壁21、承接板22、内框壁23及挡筋24均呈长条状结构，且外框壁21、承接板22、内框壁23及挡筋24均无复杂的结构，本实施例的中框2可采用塑料颗粒通过挤塑模具一次性挤出成型。并可通过在模内覆膜工艺，在挤出塑料形材的同时，完成外观膜25覆膜效果，形成覆膜塑料型材。
挤出覆膜工艺具体可包括：将塑料颗粒(如ABS颗粒)放入挤出覆膜机组的料仓中， 再将外观膜25(如PET薄膜)安装到挤出覆膜机组的装饰膜辊上，启动挤出覆膜机组，通过设置在挤出覆膜机组上的口膜，挤出特定截面的塑料型材。在挤出塑料型材的同时，将其与外观膜25一起复合形成覆膜塑料型材。
图8是图4在另一视角下的结构示意图。图9是图8中D区域的放大结构示意图。图10是图9的分解结构示意图。图11是图10中去掉角部加强片26的结构示意图。图12是图8的中框2在弯折前的结构示意图。图13是图12的正视图。图14是图13中E区域的放大结构示意图。图15是图12在另一视角下的结构示意图。
请参阅图4和图8，在本实施例中，中框2为一体折弯成型的三边框框架结构。中框2可采用热弯折工艺，将挤塑成型的型材通过工装模具进行两次直角弯折，形成U型的三边中框2结构。
请参阅图12至图15，在折弯前，承接板22上开设有折弯缺口221。该折弯缺口221呈V字形，并由承接板22远离外框壁21的一端向靠近外框壁21的一侧延伸开设；V字形折弯缺口221的尖端朝向外框壁21，且折弯缺口221的尖端为圆弧过渡，该圆弧的半径R2在0.5-2mm之间，以使承接板22能够在折弯缺口221的尖端处顺利弯折。
在需要折弯时，承接板22和外框壁21在折弯缺口221处进行弯折，以使中框2在折弯缺口221处形成折弯角。该折弯角可在60°-120°之间，可根据显示面板1及背板3的轮廓形状进行调整。当折弯角为90°，即形成直角弯折结构。
请参阅图13和图14，在一些实施例中，折弯缺口221的尖端与外框壁21之间具有间隔，该间隔在0.5-2mm之间。在中框2中，弯折角部处是结构强度最弱的地方，该间隔可用于使折弯缺口221与外框壁21之间保留一定的结构间距，在弯折后能够加强弯折角部的结构强度，使中框2在弯折角处能够具有足够的结构强度。
为保证折弯过程中，外框壁21不会在弯折角处开裂，在一些实施例中，需要对挤塑成型的ABS(Acrylonitrile Butadiene Styrene的首字母缩写)塑料颗粒进行改性。在ABS塑料颗粒中添加有氧化镁、碳酸钡等用于降低挤塑型材热胀冷缩量的填充材料。在挤塑成型过程中，改性后的ABS塑料颗粒在熔融状态下型材塑料流体，内部呈自由卷曲的稳定态，通过挤出机口膜挤出成型后，处于亚稳定的状态，经过后期60-80℃的回火处理90-100h后，可提高型材的稳定性、韧性，并降低型材的热胀冷缩量，有效地防止中框2在低温收缩时在折弯处附近开裂，并有效避免在高温膨胀时天侧中框2扭曲。
请参阅图9至图11，并结合图15，中框2还包括角部加强片26。角部加强片26为冲压成型的金属片，角部加强片26呈夹角相连的V型结构，该V型结构的夹角在60°-120°之间。当中框2为直角弯折结构时，该V型结构的夹角为90°。
请参阅图15，在一些实施例中，在折弯前，承接板22的后侧壁上于折弯缺口221的两侧开设有安装槽222，两安装槽222均与折弯缺口221连通。
请参阅图9至图11，在折弯后，折弯缺口221合拢形成折弯缝220，且两安装槽222呈夹角相连，两安装槽222之间的夹角与角部加强片26相对应，进而使角部加强片26能够适配安装于呈夹角相连的两安装槽222内。可以理解的是，承接板22的后侧壁也可以部设置安装槽222，而直接将角部加强片26固定于承接板22在折弯处的后侧壁上。
在一些实施例中，承接板11的前侧壁与外框壁21的内侧壁之间形成有用于装设显示面板1的台阶槽201。中框2还包括覆盖在外框壁21的外侧壁上的外观膜。
本申请实施例的显示装置中，对中框2的结构进行优化，利用内框壁23与外框壁21及承接板22配合，可围成一容纳腔202，并通过挡筋24将背板3的边沿夹设于在该容纳腔202内，以实现中框2与背板3之间的稳定可靠连接，保持背板3、中框2及显示面板1之间结构的稳定性。使中框2与背板3之间无需采用卡扣或螺钉等方式，即可实现中框2与背板3之间的连接固定，有利于简化显示装置中中框2的结构，便于中框2采用挤塑成型的方式进行制作，有利于降低生产和研发的成本。
相关技术中，中框一般都会采用注塑模具一体注塑成型，这种注塑模具需要采用热流 道成型，成本十分高昂，产品开发投入较大，研发时间较长。也有一些中框采用金属冲压、折弯等工艺来制备，从结构上看，该金属中框限于工艺，其截面仅能获得U型或L型结构，无法设置适当的筋位来实现相应地限位或连接需求。还有一些中框采用挤出成型的工艺制备，但其外观效果不够理想。
基于此，本申请另一些实施例提供一种显示装置。图1是本申请一实施例的显示装置的结构示意图。图16是图1中A区域的放大结构示意图。图17是图1中中框2处的剖面示意图。
请参阅图1、图16和图17所示，本申请实施例提供的显示装置主要包括显示面板1、背板3、扩散板4、光学膜片5、反射板6及中框2。
显示面板1位于显示装置的前侧，显示面板1的前侧面为显示面，用于显示图像。该显示装置可以不限于电视机、电脑显示器、数码相框等电子产品。
背板3间隔地设于显示面板1的背侧。背板3用于为显示面板1、扩散板4、光学膜片5、反射板6等部件提供安装空间，并进行结构支撑。
背板3的前侧设有背光源(图中未示出)，背光源用于发出光线并射向显示面板1，进而实现显示面板1的图像显示功能。
扩散板4平行地设于显示面板1的背侧，并位于显示面板1与背板3之间。扩散板4具有光扩散特性，其可采用具有光扩散材料制成。扩散板4用于将背光源所发出的光线进行扩散，以照射到显示面板1上的光线更加均匀，因此扩散板4配合背光源，可以为显示面板1提供均匀的面光源。
光学膜片5设于扩散板4的出光面，即光学膜片5贴设在扩散板4的前侧面。光学膜片5用于对扩散板4的出光面所发出光线的光形做进一步处理，以达到均匀化面光源的目的。光学膜片5通常包含扩散片、增光膜、棱镜片等多层光学膜片5，多层光学膜片5可层叠在一起。
反射板6设于背板3的前侧，并间隔地布置于扩散板4的背侧。反射板6能够对背光源上射出的光线以及扩散板4射出的光线进行反射，以提高光线的利用率，并使光线更为均匀。
中框2位于显示装置的周侧，用于对显示面板1及背板3的周侧进行有效地封闭和防护。中框2用于连接固定显示面板1和背板3，以便于扩散板4、光学膜片5、反射板6等部件能够固定在显示面板1与背板3之间。
图18是图17中外观膜25的第一实施例的结构示意图。
请参阅图16至图18，中框2包括一体连接的外框壁21、承接板22、内框壁23及外观膜25。其中，承接板22也可以称为承接壁；外观膜25也可以称为外观层。
外框壁21呈长条状结构，并贴设在显示面板1和背板3的一侧，即位于显示面板1边沿的外侧。外框壁21在显示装置的前后方向上延伸有一定宽度，以使外框壁21能够同时防护在显示面板1和背板3的外侧。
承接板22呈长条型的板状结构，承接板22凸设形成于外框壁21的内侧壁上，承接板22可由外框壁21的部分内侧壁向显示面板1的中心侧凸出延伸形成。
承接板22的前侧面作为显示面板1的承接面，即显示面板1背面的周沿贴设固定在承接板22的前侧面上。
在一些实施例中，外框壁21的前端部向前凸伸出承接板22的前侧面，以使外框壁21的内侧壁与承接板22的前侧面之间形成有台阶槽201。该台阶槽201可供显示面板1进行贴装，使显示面板1收容在该台阶槽201内，外框壁21的前端部可对显示面板1的周沿进行有效地防护。
在一些实施例中，承接板22的前侧壁上贴设有第一粘接条7，显示面板1的周沿可通过该第一粘接条7贴设在承接板22的前侧面上。第一粘接条7夹设在承接板22的前侧壁与显示面板1之间，第一粘接条7既可以在承接板22与显示面板1之间起到粘接固定的 作用，又可以在承接板22与显示面板1之间起到密封的作用，还可以在承接板22与显示面板1之间起到缓冲的作用。第一粘接条7也可以称为第一胶带，第一粘接条7可采用泡棉双面胶带。
内框壁23呈长条状结构，内框壁23间隔地设于外框壁21的内侧。内框壁23可由承接板22的内端边沿向后弯折延伸形成。且外框壁21、承接板22及内框壁23之间围成有容纳腔202，该容纳腔202用于固定背板3的边沿。容纳腔202也可以称为收容槽。
在一些实施例中，背板3包括一体弯折成型的主体部31、包边32和折边33。其中，包边32也可以称为翻边。主体部31间隔地设于显示面板1的后侧。需要说明的是，主体部31可呈平面的板状结构，或中心向后侧凸设的壳体结构。包边32由主体部31的周沿向前侧弯折延伸形成。折边33由包边32的前端边沿向背板3的中心侧弯折延伸形成。主体部31、包边32和折边33之间可形成U型或C型弯折结构。
该U型或C型弯折结构布置于容纳腔202内。折边33能够贴设在承接板22的后侧面上，包边32则能够贴设在外框壁21的内侧壁面上。扩散板4、光学膜片5及反射板6的边沿能够伸入布置于该U型或C型弯折结构内部。
在一些实施例中，承接板22的后侧壁上贴设有第二粘接条8，背板3的折边33可通过该第二粘接条8贴设在承接板22的后侧壁面上。第二粘接条8夹设在承接板22的后侧壁与折边33之间，第二粘接条8可起到粘接、固定、密封、缓冲等作用。第二粘接条8也可以称为第二胶带。第二粘接条8可采用VHB胶带，即聚丙烯酸酯双面泡绵胶带。
仍参阅图16至图18，外观膜25一体成型并覆盖在外框壁21的外侧壁上，作为中框2的外观面，同时作为显示装置的周侧的外观面。外观膜25作为外观面，其颜色可根据需求进行调整。需要说明的是，外框壁21、承接板22及内框壁23作为中框2的非外观面，隐藏于外观膜25与显示面板1及背板3之间。
请参阅图18，在一些实施例中，外观膜25一体成型并覆盖在外框壁21的前侧面上，可以与显示面板1一起组成显示装置的前侧外观面。外观膜25覆盖在外框壁21前侧面的部分可以与显示面板1的前表面平齐。外框壁21的前侧面的宽度也可代表显示装置的显示面的边框宽度。可以理解的是，该外框壁21的前侧面的宽度越窄，越有利于形成窄边框的显示装置。
在一些实施例中，外观膜25覆盖在外框壁21的前侧面的部分还能够布置于台阶槽201的内壁上，并覆盖外框壁21的部分内侧壁。外观膜25覆盖在外框壁21的前侧面和内侧面的部分能够形成弯折结构，使得外观膜25的前端能够隐藏在台阶槽201中，能够有效地避免外观膜25的前端部产生翘边现象。可以理解的是，外观膜25可以完全覆盖外框壁21的属于台阶槽201的内侧壁。
在一些实施例中，外观膜25一体成型并覆盖在外框壁21的后侧面上，可以与背板3一起组成显示装置的背侧外观面。
在一些实施例中，外观膜25覆盖在外框壁21的前侧面的部分还能够布置于容纳腔202的内壁上，并覆盖外框壁21的部分内侧壁。外观膜25覆盖在外框壁21的背面和内侧面的部分能够形成弯折结构，使得外观膜25的后端能够隐藏在容纳腔202中，能够有效地避免外观膜25的后端部产生翘边现象。可以理解的是，外观膜25可以完全覆盖外框壁21的属于容纳腔202的内侧壁。
仍请参阅图18，中框2中的外框壁21、承接板22、内框壁23及外观膜25均呈长条状结构，中框2与显示面板1、背板3之间采用胶带粘贴，且外框壁21、承接板22、内框壁23及外观膜25的表面平整、无复杂结构，因此有利于简化显示装置的中框2的结构，便于中框2采用塑料颗粒通过挤塑模具一次性挤出成型，有利于降低生产和研发的成本。其中，作为外观面的外观膜25所采用的塑料颗粒与作为非外观面的外框壁21、承接板22、内框壁23所采用的塑料颗粒材质、颜色不同，例如非外观面采用ABS颗粒，外观面采用亚克力。两种材料的塑料颗粒采用混合共挤的工艺一次挤出形成长条状的塑料型材。
混合挤塑工艺具体可包括：将塑料改性的ABS颗粒与作为外观面的亚克力颗粒放入各自的挤出覆膜机组的料仓中，启动挤出覆膜机组，通过设置在挤出覆膜机组上的口膜，挤出特定截面的塑料型材。在挤出塑料型材的同时，两者一体成型在一起。
在上述过程中，改性ABS和亚克力在180℃下是熔融状态的塑料流体，内部呈自由卷曲稳定态，通过挤出机口模挤出成型后，处于亚稳态的状态，经过后期70℃～80℃回火处理，提高尺寸稳定性。
需要说明的是，本申请实施方式主要优选塑料ABS为材质作为非外观面选材，亚克力作为外观面选材，但中框2的塑料原料并不限于该两者，譬如可以选用PC/ABS、PC/ABS+GF10、PP(polypropylene,聚丙烯)或其他塑料原料，其中，PC/ABS，聚碳酸酯和丙烯腈-丁二烯-苯乙烯共聚物和混合物，是由聚碳酸酯(Polycarbonate)和聚丙烯腈(ABS)合并而成的热可塑性塑胶。
图19是图17中外观膜25的第二实施例的结构示意图。
请参阅图19，在一些实施例中，外观膜25包括一体成型的第一外观部251和第二外观部252。第一外观部251与第二外观部252呈前后分隔布置，并均沿外框壁21的长度方向延伸。第一外观部251与第二外观部252可采用不同颜色的亚克力塑料颗粒，进而丰富外观膜25的外观效果。混合挤塑工艺中，使第一外观部251与第二外观部252放入各自的挤出覆膜机组的料仓中，在各自的模具通道中加热、熔融、挤出，最终汇合并与非外观面的ABS一体挤出成型。
图20是图17中外观膜25的第三实施例的结构示意图。
请参阅图20，在另一些实施例中，外观膜25同样包括一体成型的第一外观部251和第二外观部252。与图19中实施例的区别在于，第二外观部252分布在第一外观部251中间位置，且第二外观部252将第一外观部251分隔成前后间隔的两个部分。
需要说明的是，第二外观部252可以设于外框壁21的外侧壁的位置，也可以设于外框壁21的前侧壁或后侧壁的位置。
图21是图17中外观膜25的第四实施例的结构示意图。
请参阅图21，在另一些实施例中，外观膜25包括一体成型的第一外观部251、第二外观部252和第三外观部253。第一外观部251、第二外观部252和第三外观部253采用不同颜色的亚克力塑料颗粒，进而丰富外观膜25的外观效果。
第一外观部251、第二外观部252和第三外观部253呈分隔布置，并均沿外框壁21的长度方向延伸。第二外观部252分布在第一外观部251中间位置，且第二外观部252将第一外观部251分隔呈前后间隔的两个部分。同时，第三外观部253分布在第二外观部252中间位置，且第三外观部253将第二外观部252分隔呈前后间隔的两个部分。
图22是图17中外观膜25的第五实施例的结构示意图。
请参阅图22，在另一些实施例中，外观膜25包括一体成型的第一外观部251、第二外观部252和第三外观部253。与图21中实施例的区别在于，第三外观部253与第二外观部252呈前后间隔布置，且第二外观部252和第三外观部253将第一外观部251分隔呈前中后间隔布置的三个部分。
图23是图17中外观膜25的第六实施例的结构示意图。
请参阅图23，在另一些实施例中，外观膜25包括一体成型的第一外观部251、第二外观部252和第三外观部253。与图21中实施例的区别在于，第一外观部251、第二外观部252和第三外观部253采用前中后依次分隔布置。
图24是图16中的中框2在折弯前的结构示意图。图25是图24的正视图。图26是图24的中框2在折弯后的结构示意图。
请参阅图24至图26，在本实施例中，中框2为一体折弯成型的三边框框架结构。中框2采用热弯折工艺，将挤塑成型的型材通过工装模具进行两次直角弯折，形成U型的三边框结构。中框2的三边框结构分别布置于显示面板1的左右两侧及天侧。
在折弯前，承接板22上开设有折弯缺口221。该折弯缺口221呈V字形，并由承接板22远离外框壁21的一端向靠近外框壁21的一侧延伸开设。V字形的折弯缺口221的尖端朝向外框壁21，且折弯缺口221的尖端为圆弧过渡，该圆弧的半径在0.5-2mm之间，以使承接板22能够在折弯缺口221的尖端处顺利弯折。在折弯后，折弯缺口221合拢形成折弯缝220，外框壁21和外观膜25上形成有与折弯缝220相对应的折弯部。
需要说明的是，在折弯时，需要对外框壁21和外观膜25的折弯部进行加热处理，再对折弯缺口221处进行弯折，以使承接板22、外框壁21及外观膜25在折弯缺口221处能够顺利弯折。
采用上述混合共挤和热弯折工艺的结合，可一次性实现塑料型材外观的不同装饰效果，可以用廉价的挤出模具替代成本高额的注塑模具，并缩短开模周期。
图27是图26中B区域的放大结构示意图。图28是图27的分解结构示意图。图29是图28中去掉角部加强片26的结构示意图。
请参阅图27至图29，中框2的弯折连接处设有角部加强片26。角部加强片26用于固定和加强中框2在折弯处的结构。角部加强片26为冲压成型的金属片，角部加强片26呈夹角相连的V型或L型结构，该V型或L型结构的夹角在60°-120°之间。当中框2为直角弯折结构时，该V型或L型结构的夹角为90°。
在一些实施例中，折弯前，承接板22的后侧壁上于折弯缺口221的两侧开设有安装槽222，两安装槽222均与折弯缺口221连通。
折弯后，折弯缺口221合拢形成折弯缝220，且两安装槽222呈夹角相连，两安装槽222之间的夹角与角部加强片26相对应，进而使角部加强片26能够适配安装于呈夹角相连的两安装槽222内。角部加强片26可采用胶水直接粘贴在安装槽222内。
可以理解的是，承接板22的后侧壁上也可以不设置安装槽222，角部加强片26可直接粘贴在承接板22的弯折处的后侧壁上。
图30是图29的另一实施例的结构示意图。
请参阅图30，在一些实施例中，承接板22的后侧壁也可以不设置角部加强片26，而直接通过超声波焊的工艺，在折弯缝220处形成焊缝。
图31是图28中角部加强片26在另一实施例下的剖面示意图。图32是图31中角部加强片26焊接在中框2上的剖面示意图。
请参阅图31和图32，在一些实施例中，角部加强片26的面向承接板22的侧壁上形成有多个凸纹261，凸纹261呈条状，多个凸纹261呈平行间隔布置。此时，角部加强片26采用超声波焊的方式将角部加强片26和中框2的折弯处焊接在一起。
图33是图28中角部加强片26在又一实施例下的剖面示意图。图34是图33中角部加强片26冲压在中框2上的剖面示意图。图35是图34中去掉角部加强片26的结构示意图。
请参阅图33和图34，在一些实施例中，角部加强片26的面向承接板22的侧壁上凸设有多个连接管262，连接管262呈结构。同时，在承接板22的折弯缺口221的两侧分别设有与连接管262相对应的通孔223。
在折弯后，角部加强片26上的多个连接管262一一对应插接于承接板22的通孔223内。角部加强片26采用冲压的方式使连接管262压缩变形，将角部加强片26和承接板22的折弯处冲压为一体。采用冲压工艺代替胶粘工艺，可节省了胶水的固化时间，有利于提高中框2在折弯角处的可靠性。
本申请实施例的显示装置中，利用中框2的外框壁21和承接板22的结构配合，使承接板22的前后侧分别形成台阶槽201和容纳腔202，进而使显示面板1和背板3能够分别固定在承接板22的前后两侧，解决了中框2、显示面板1及背板3的连接固定问题。同时，利用外观膜25一体成型在并覆盖在外框壁21的外侧壁上，作为显示装置的周侧的外观面，进而丰富并优化了中框2的外观效果，以满足不同消费者的外观需求。
为了方便解释，已经结合具体的实施方式进行了上述说明。但是，上述示例性的讨论不是意图穷尽或者将实施方式限定到上述公开的具体形式。根据上述的教导，可以得到多种修改和变形。上述实施方式的选择和描述是为了更好的解释原理以及实际的应用，从而使得本领域技术人员更好的使用所述实施方式以及适于具体使用考虑的各种不同的变形的实施方式。

Claims (20)

  1. 一种显示装置，包括：
    中框，包括一体连接的外框壁、承接板、内框壁及挡筋；所述承接板凸设形成于所述外框壁的内侧壁上；所述内框壁由所述承接板的内侧边沿向后弯折延伸；所述挡筋由所述内框壁的后侧边沿向所述外框壁的方向弯折延伸；所述内框壁、承接板及外框壁之间围成有容纳腔；
    显示面板，位于所述中框的前侧，并贴设于所述承接板的前侧壁上；及
    背板，位于所述中框的后侧，且所述挡筋将所述背板的边沿夹设于所述容纳腔内。
  2. 如权利要求1所述的显示装置，所述背板的周沿形成有向前延伸的包边，所述包边的前侧边沿向所述背板的中心侧延伸形成有折边；
    所述包边贴设于所述外框壁的内侧壁上；
    所述折边贴设于所述承接板的后侧壁上，并夹设于所述容纳腔内。
  3. 如权利要求2所述的显示装置，所述折边与所述承接板的后侧壁之间贴设有第一粘接条。
  4. 如权利要求1所述的显示装置，所述承接板的前侧壁与所述显示面板之间贴设有第二粘接条。
  5. 如权利要求1所述的显示装置，所述外框壁的前端部与所述承接板的前侧壁之间形成有台阶槽，所述显示面板装设于所述台阶槽内。
  6. 如权利要求1所述的显示装置，所述外框壁的外侧壁、前端壁及后端壁均包覆有外观膜；所述外观膜的前端边沿和后端边沿均部分伸入并包覆在所述外框壁的内侧壁上；
    所述外框壁的前端壁和后端壁与所述外框壁的内侧壁之间的过渡部均为圆滑过渡。
  7. 如权利要求1所述的显示装置，所述中框为一体折弯成型的多边框架结构；在折弯前，所述承接板上开设有折弯缺口，所述承接板和所述外框壁在所述折弯缺口处进行弯折，以使所述中框在所述折弯缺口处形成折弯角；
    所述折弯缺口呈V字形，所述折弯缺口的尖端朝向所述外框壁，且所述折弯缺口的尖端为圆弧过渡。
  8. 如权利要求7所述的显示装置，所述折弯缺口的尖端与所述外框壁之间具有间隔。
  9. 如权利要求8所述的显示装置，所述外框壁和所述承接板采用塑料粒子通过挤塑一体成型，所述挤塑成型后的外框壁和承接板经过回火60-80℃处理；
    所述塑料粒子为ABS塑料颗粒，且所述塑料粒子中添加有用于降低材料热胀冷缩量的填充材料。
  10. 如权利要求7所述的显示装置，所述承接板的后侧壁上于所述折弯缺口的两侧开设有安装槽，所述安装槽与所述折弯缺口连通；
    所述中框还包括角部加强片；在折弯后，所述折弯缺口合拢形成折弯缝，且两所述安装槽呈夹角相连；所述角部加强片适配安装于呈夹角相连的两所述安装槽内。
  11. 如权利要求1所述的显示装置，所述承接板的前侧壁与所述外框壁的内侧壁之间形成有用于装设所述显示面板的台阶槽；所述中框还包括覆盖在所述外框壁的外侧壁上的外观膜；所述外框壁、所述承接板和所述外观膜一体成型。
  12. 一种显示装置，包括：
    显示面板；
    中框，所述中框包括一体成型的外框壁、承接板和外观膜；所述外框壁位于所述显示面板的一侧；所述承接板凸设形成于所述外框壁的内侧壁上；所述承接板的前侧壁与所述外框壁的内侧壁之间形成有用于装设所述显示面板的边沿的台阶槽；所述承接板的后侧壁与所述外框壁的内侧壁之间形成有容纳腔；所述外观膜覆盖在所述外框壁的外侧壁上；及
    背板，设于所述显示面板的背侧，所述背板的边沿装设于所述容纳腔内。
  13. 如权利要求12所述的显示装置，所述外观膜采用与所述外框壁及所述承接板不同的塑料材质，所述外观膜与所述外框壁及所述承接板采用混合挤塑的方式挤出成型为一体。
  14. 如权利要求12所述的显示装置，所述外观膜的前端延伸并覆盖在所述外框壁的前侧壁上。
  15. 如权利要求14所述的显示装置，所述外观膜的前端伸入布置于所述台阶槽的内壁上，并至少覆盖所述外框壁的部分内侧壁。
  16. 如权利要求12所述的显示装置，所述外观膜的后端延伸并覆盖在所述外框壁的后侧壁上。
  17. 如权利要求16所述的显示装置，所述外观膜的后端伸入布置于所述容纳腔的内壁上，并至少覆盖所述外框壁的部分内侧壁。
  18. 如权利要求12所述的显示装置，所述外观膜包括一体成型的第一外观部和第二外观部，所述第一外观部与所述第二外观部呈分隔布置，并均沿所述外框壁的长度方向延伸。
  19. 如权利要求18所述的显示装置，所述第一外观部与所述第二外观部采用不同颜色的塑料材质，并采用混合共挤的方式挤出成型为一体。
  20. 如权利要求12所述的显示装置，在折弯前，所述承接板上开设有折弯缺口；所述折弯缺口呈V字形，所述折弯缺口的尖端朝向所述外框壁；
    在折弯后，所述折弯缺口合拢形成折弯缝，所述外框壁上形成与所述折弯缝相对应的折弯部。
PCT/CN2022/074094 2021-02-05 2022-01-26 显示装置 WO2022166722A1 (zh)

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