WO2020207060A1 - 一种液晶显示装置 - Google Patents

一种液晶显示装置 Download PDF

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Publication number
WO2020207060A1
WO2020207060A1 PCT/CN2019/129298 CN2019129298W WO2020207060A1 WO 2020207060 A1 WO2020207060 A1 WO 2020207060A1 CN 2019129298 W CN2019129298 W CN 2019129298W WO 2020207060 A1 WO2020207060 A1 WO 2020207060A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
display device
crystal display
film
substrate
Prior art date
Application number
PCT/CN2019/129298
Other languages
English (en)
French (fr)
Inventor
闫光伟
唐志强
杨晓光
程宁宁
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 CN201910281605.5A external-priority patent/CN110007517A/zh
Priority claimed from CN201920471199.4U external-priority patent/CN209657045U/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 WO2020207060A1 publication Critical patent/WO2020207060A1/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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a liquid crystal display device.
  • the LCD TVs generally include a backlight module and a liquid crystal panel. According to the different light incident methods in the backlight module, the backlight module can be divided into a direct type backlight module and an edge type backlight module.
  • the backlight module generally includes a back plate, a middle frame, a light guide plate or a diffuser plate, and an optical film on the light-emitting side of the light guide plate or the diffuser plate.
  • the optical film is mainly used for concentrating light and improving brightness.
  • diaphragm hanging ears are often set on the optical diaphragm, and the optical diaphragm is fixed by hooking the diaphragm hanging ear to the bump on the middle frame.
  • tape is also used to enhance the degree of fixation, but the phenomenon that the diaphragm jumps out of the diaphragm hanger still occurs.
  • the present disclosure provides a liquid crystal display device, which can prevent the problem of the optical film from jumping out of the ear of the film.
  • the liquid crystal display device of the present disclosure includes:
  • the middle frame includes a diaphragm carrying portion and a protrusion on the diaphragm carrying portion;
  • the optical diaphragm includes an optical diaphragm body and a diaphragm hanging ear connected to the optical diaphragm body, the diaphragm hanging ear is placed on the diaphragm carrying portion, and the diaphragm hanging ear is connected to the protrusion Connect
  • a film tape a film hanger that is adhered to the middle frame and covers the optical film, wherein the film tape includes a first substrate and a second substrate arranged in the thickness direction, the first The compressibility of a substrate is greater than the compressibility of the second substrate.
  • FIG. 1 is a schematic diagram of an exploded structure of a liquid crystal display device provided by an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of the structure of the backplane shown in FIG. 1;
  • Fig. 3 is a schematic cross-sectional structure diagram of the back plate at E-E′ in Fig. 2;
  • FIG. 4 is a schematic diagram of the three-dimensional structure of the third middle frame shown in FIG. 1;
  • Figure 5 is an enlarged view of the circled part of Figure 4.
  • FIG. 6 is a simple top view of a liquid crystal display device provided by an embodiment of the disclosure.
  • FIG. 7 is a schematic cross-sectional structure diagram of the liquid crystal display device in FIG. 6 at A-A′;
  • FIG. 8 is a schematic cross-sectional structure diagram of the liquid crystal display device in FIG. 6 at B-B';
  • FIG. 9 is a schematic diagram of the cross-sectional structure of the liquid crystal display device in FIG. 6 at C-C';
  • FIG. 10 is a schematic diagram of the cross-sectional structure of the liquid crystal display device in FIG. 6 at D-D′;
  • FIG. 11 is a schematic cross-sectional three-dimensional structure diagram of the liquid crystal display device in FIG. 6 at D-D′;
  • FIG. 12 is a top view of a film tape 300 according to an embodiment of the disclosure.
  • FIG. 13 is a cross-sectional view of the film tape 300 along the thickness direction of the embodiment of the disclosure.
  • FIG. 14 is a schematic diagram of a part of the structure of the liquid crystal display device of the embodiment of the disclosure after the liquid crystal panel is removed;
  • Figure 15 is an enlarged view of the circled part of Figure 14;
  • FIG. 16 is a partial structural diagram of a related art liquid crystal display device with a liquid crystal panel removed;
  • FIG. 17 is a cross-sectional view of a related art liquid crystal display device at the ear of the diaphragm
  • 18A-18D are process diagrams of the related art liquid crystal display device film jumping out
  • 19 is a schematic diagram of a process in which the film of the liquid crystal display device of the embodiment of the disclosure does not jump out;
  • FIG. 20 is a cross-sectional view of a liquid crystal display device at the ear of the diaphragm according to another embodiment of the disclosure.
  • connection should be understood in a broad sense, for example, it can be a contact connection or a detachable connection. Connected or integrally connected; for those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood in specific situations.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present disclosure.
  • the liquid crystal display device 1000 includes a backlight module and a liquid crystal panel 200.
  • the liquid crystal display device 1000 When viewed in a plan view, the liquid crystal display device 1000 has a rectangular shape with short sides and long sides, the direction of the short sides is referred to as the first direction D1, and the direction of the long sides is referred to as the second direction D2.
  • the second direction D2 is substantially perpendicular to the first direction D1.
  • the backlight module and the liquid crystal panel 200 are sequentially stacked along a third vertical direction D3 substantially orthogonal to the plane of the first direction D1 and the second direction D2.
  • the backlight module includes a back plate 110, a light source 120, a reflection sheet 130, a diffusion plate 140, an optical film 150, and a film tape 300 for supporting in sequence.
  • the light source 120 generates light and includes a plurality of LED light bars 121 arranged along the second direction D2, and the plurality of LED light bars 121 are arranged substantially in parallel.
  • the light bar 121 includes a circuit board 1211 and a plurality of LED lights 1212 on one side of the circuit board 121, the other side of the circuit board 1211 is in contact with the back plate 110, and the light bar 121 is fixed on the back plate 110 through a connecting member.
  • the reflective sheet 130 is used to reflect light to the light emitting direction.
  • the reflective sheet 130 is fixed on the surface of the back plate 110, and a plurality of through holes are provided on the reflective sheet 130 to expose the LED lamp 1212.
  • the diffuser 140 refracts and reflects the light from the light source 120, thereby achieving uniformity of the light.
  • the optical film 150 generally includes one or more films, which are mainly used for concentrating light and improving brightness.
  • the backlight module 100 further includes a diffuser support on the backplane 110 and used for supporting the diffuser 140, thereby ensuring the light mixing distance of the liquid crystal display device 1000.
  • the backlight module 100 further includes a middle frame assembly 160 located at the edges of the reflective sheet 130, the diffuser plate 140 and the optical film 150.
  • the middle frame assembly 160 includes a first middle frame 161 substantially parallel to the first direction D1.
  • the second middle frame 162, the third middle frame 163 and the fourth middle frame 164 which are substantially parallel to the second direction D2, and the fourth middle frame 164 and the front housing 170 are connected in cooperation.
  • the middle frames in the middle frame assembly 160 are assembled by splicing.
  • the first, second, and third middle frames can also be integrally formed.
  • a middle frame tape 180 is provided between the first middle frame 161, the second middle frame 162, the third middle frame 163 and the back plate 110, so that the middle frame assembly 160 is fixed on the back plate 110 by the middle frame tape 180.
  • a panel tape 190 is provided between the middle frame assembly 170 and the liquid crystal panel 200, and the liquid crystal panel 200 is fixed to the middle frame assembly 160 through the panel tape 190.
  • the film tape 300 is sticky on one side, and its setting position corresponds to the edge of the optical film 150.
  • the film tape 300 is correspondingly disposed at the film hanging ear of the optical film 150, and is located between the optical film 150 and the optical film 150. Between the liquid crystal panels 200, the optical film 150 is fixed on the middle frame assembly.
  • the display device 1000 may further include a rear case (not shown) coupled to the back plate 110 on the side away from the liquid crystal panel 200.
  • FIG. 2 is a three-dimensional structural diagram of the back plate 110 shown in FIG. 1, and FIG. 3 is a cross-sectional diagram of the back plate 110 in FIG. 2 at the position E-E'.
  • the back plate 110 includes a bottom 111 and a first side wall 112, a second side wall 113, and a third side wall 114 extending along the third direction D3 of the liquid crystal display device 1000, the first side wall 112 and The second side wall 113 is substantially parallel to the first direction D1, the third side wall 114 is substantially parallel to the second direction D2, and the bottom 111 is parallel to the direction where the liquid crystal panel 200 is located.
  • the third side wall 114 includes a first sub-side wall 1141 and a second sub-side wall 1142 extending in opposite directions along the third direction D3 of the liquid crystal display device 1000, and the second sub-side wall 1142 Located at the inner side of the back plate 110, the first side wall 1141 and the second side wall 1142 are connected by a side wall connecting portion 1143, and the first side wall 1141, the second side wall 1142 and the side wall connecting portion 1143 are integrated Connected, the second sub-side wall 1142 is formed by integral bending. In this way, the strength of the back plate 110 is enhanced through the processing of the bending process.
  • the back plate 110 also includes a back plate connecting portion 115 between the bottom 111 and the side wall, and the back plate connecting portion 115 includes an inclined surface portion 1151 connected to the edge of the bottom 111 A platform portion 1152 connected to one end of the first side wall 112 or the second side wall 113 or the third side wall 114 and a transition portion 1153 connecting the inclined surface portion 1151 and the platform portion 1152.
  • the inclined angle ⁇ of the inclined portion 1151 relative to the bottom 111 is in the range of about 20 to about 50 degrees.
  • the optimized curve design makes the display device lighter and thinner in appearance, and achieves a good appearance effect.
  • the plane where the platform part 1152 is located is roughly perpendicular to the third direction D3 and parallel to the plane where the liquid crystal panel 200 is located.
  • the plane where the transition part 1153 is roughly parallel to the third direction D3.
  • the three-stage design of the inclined surface, the transition part and the platform part is reduced.
  • the process difficulty of the backplane in the actual production process is reduced.
  • first side wall 112 side, the second side wall 113 side and the fourth side wall 114 side of the back plate 110 have substantially the same structure.
  • the bottom 111, the first side wall 112, the second side wall 113, the third side wall 114, and the connecting portion 115 of the back plate 110 are an integral structure, that is, the back plate 110 is an integral structure.
  • the back plate 110 In terms of processing technology, it can be processed in a way of integral bending, one is to increase the strength of the back plate 110, and the other is to have a good appearance effect.
  • the back plate 110 includes three integrally formed side walls, for assembly requirements, the fourth side except the three side walls is not provided with the above side wall structure, which facilitates the assembly of the diffuser plate and the diaphragm.
  • FIG. 4 is a three-dimensional structural diagram of the third middle frame 163 shown in FIG. 1, and FIG. 5 is an enlarged view of the circled part in FIG. 4.
  • the third middle frame 163 forms a groove-like structure as a whole.
  • the third middle frame 163 includes a first supporting portion 1631 and a second supporting portion 1632 that are perpendicular to the third direction D3 and are arranged opposite to each other.
  • the middle frame connecting portion 1633 between the first bearing portion 1631 and the second bearing portion 1632, the first bearing portion 1631, the second bearing portion 1632 and the middle frame connecting portion 1633 are enclosed in a groove-like structure.
  • the first supporting portion 1631 includes a panel supporting portion 16311 and a diaphragm supporting portion 16312. According to the lamination relationship of the liquid crystal display device 1000, the panel supporting portion 16311 and the diaphragm supporting portion 16312 have a certain height difference, forming a stepped shape, the diaphragm supporting portion 16312 is close to the end of the first carrying portion 1631.
  • the diaphragm carrying portion 16312 is further provided with a protrusion 16313, and the diaphragm hanging ear is hooked on the protrusion 16313 to realize the fixation of the diaphragm.
  • the third middle frame 163 also includes a reflective sheet bearing portion 1634 extending along one end of the second bearing portion 1632 and forming an angle ⁇ with respect to the second bearing portion 1632, and the angle ⁇ is set in a range of approximately 20 degrees to 50 degrees.
  • the reflective sheet carrying portion 1634 is used to carry the reflective sheet 130, and the reflective sheet 130 can be fixed to the reflective sheet carrying portion 1634 by bonding or the like for supporting and fixing the reflective sheet 130.
  • the third middle frame further includes a supporting portion 1635 extending along one end of the reflective sheet carrying portion 1634.
  • the supporting portion 1635 extends in a direction away from the first supporting portion 1631, the plane of the supporting portion 1635 is substantially parallel to the third direction, and the supporting portion 1635 is in contact with the back plate to play a supporting role to prevent the middle frame from turning inward.
  • first middle frame 161 and the second middle frame 162 are substantially the same as that of the third middle frame 163.
  • the difference from the third middle frame 163 is that the first middle frame 161 and the second middle frame 162 are different from each other. It includes the diaphragm carrying portion 16312, and the specific structure can be referred to the description in FIGS. 9-10.
  • FIG. 6 is a simple top view of the liquid crystal display device 1000
  • FIG. 7 is a schematic cross-sectional view of the liquid crystal display device 1000 at A-A', where A-A' exactly corresponds to the position of the diaphragm hanging ear.
  • the liquid crystal display device 1000 includes a back plate 110, a reflective sheet 130, a diffuser plate 140, an optical film 150, a third middle frame 163 and a liquid crystal panel 200.
  • the third middle frame 163 is located on the side of the side wall 114 of the back plate 110 close to the bottom 111.
  • the third middle frame 163 includes a first bearing portion 1631 and a second bearing portion 1632 which are arranged oppositely and are connected to the first bearing portion 1631 and the second bearing portion 1631.
  • the middle frame connecting portion 1633 between the two supporting portions 1632, the first supporting portion 1631, the second supporting portion 1632 and the middle frame connecting portion 1633 are enclosed in a groove-shaped structure, and the diffuser 140 is located in the groove-shaped structure,
  • the first carrying portion 1631 carries the liquid crystal panel 200.
  • the middle frame is arranged on the side wall of the back panel near the bottom, the liquid crystal panel is placed on the first bearing part of the middle frame, and the diffuser is placed on the first bearing part and the second bearing part and the connecting part of the middle frame.
  • the groove structure in this way, no frame is required on this side to ensure that the internal components in the liquid crystal display device are not exposed, and the diffuser and the liquid crystal panel are also fixed, thereby realizing the frameless design of the liquid crystal display device.
  • the third side wall 114 includes a first sub-side wall 1141, a side wall connecting portion 1143, and a second sub-side wall 1142 that are integrally connected. The three are formed by integral bending.
  • the third middle frame 163 is located on the second sub-side wall 1142.
  • the side away from the first sub-side wall, after such assembly, compared to the case where the third side wall only includes the first sub-side wall 1141, the side wall connecting portion 1143 is exposed to the outside instead of the first sub-side wall.
  • the side wall connecting portion 1143 is a smoothly transitioned curved surface with a good appearance.
  • the first side wall 1141 and the side wall connecting portion 1143 can be directly sprayed on the first side wall 1141 and the side wall connecting portion 1143 as the appearance surface.
  • the third middle frame 163 is located between the back plate 110 and the liquid crystal panel 200.
  • a middle frame tape 180 is provided between the platform portion 1152 of the back plate 110 and the second bearing portion 1632 of the third middle frame for attaching the third middle frame 163 is fixed to the back plate 110.
  • the reflective sheet 130 is located on the reflective sheet bearing portion 1634 of the third middle frame 163, and the edge of the reflective sheet 130 is located on the second bearing portion 1632. Because the reflective sheet bearing portion 1634 forms an angle ⁇ with respect to the second bearing portion 1632, correspondingly, the reflection The sheet 130 also forms an angle ⁇ with the second supporting portion 1632, that is, the reflective sheet 130 forms an angle ⁇ with respect to the bottom 111.
  • the angle of ⁇ ranges from 20 to 50 degrees, preferably 30 degrees, compared to directly attaching the reflective sheet 130 to On the back plate 110, more light from the light source is reflected back to the display area of the display device, which is beneficial to improve the display brightness of the display device.
  • the third middle frame 163 also includes a supporting part 1635 connected to one end of the reflective sheet carrying part 1634.
  • the supporting part 1635 is in contact with the inclined surface 1151 of the back plate 110 to support the middle frame and prevent the middle frame from turning inward.
  • the diffusion plate 140 is located on the side of the second supporting portion 1632 close to the liquid crystal panel 200, that is, the diffusion plate 140 is inserted into the groove-shaped structure formed by the first supporting portion 1631, the second supporting portion 1632 and the middle frame connecting portion 1633.
  • the first supporting portion 1631 of the third middle frame 163 is located between the diffusion plate 140 and the liquid crystal panel 200.
  • the optical film 150 is placed on the film carrier 16312.
  • the optical film 150 includes an optical film body 151 and a film hanging ear 152 connected to the optical film body.
  • the film hanging ear 152 is hung on the protrusion 16313,
  • the diaphragm hanging ear 152 is also provided with a diaphragm fixing tape 300 for fixing the optical diaphragm 150 to the diaphragm supporting portion 16312.
  • a panel tape 190 is provided between the liquid crystal panel 200 and the panel carrying portion 16311, thereby realizing fixing the liquid crystal panel 200 to the third middle frame 163.
  • FIG. 8 is a schematic cross-sectional view of the liquid crystal display device 1000 at B-B', where B-B' exactly corresponds to the position of the mounting ear without the diaphragm.
  • FIG. 9 is a schematic cross-sectional view of the liquid crystal display device 1000 at C-C'.
  • the difference from the structure shown in FIGS. 7-8 is that the first bearing portion 1631 of the middle frame does not include the film bearing portion 16312, but only includes the panel bearing portion 16311. There is no matching structure between the optical film 150 and the middle frame. The frame only serves to limit the position of the diaphragm.
  • FIG 10 and 11 are schematic cross-sectional views of the liquid crystal display device 1000 at D-D'.
  • the liquid crystal display device 1000 includes a back plate 110, a reflective sheet 130, a diffuser plate 140, an optical film 150, a fourth middle frame 164, a liquid crystal panel 200 and a front case 170 .
  • the fourth middle frame 164 is located at the edges of the reflective sheet 130, the diffuser plate 140 and the optical film 150.
  • the back plate 110 includes a back plate carrying portion 116 for supporting the reflective sheet 130, the diffuser plate 140 and the optical film 150, and the reflective sheet 130, the diffuser plate 140 and the optical film 150 are stacked in sequence.
  • the backboard carrying portion 116 also includes a socket 117.
  • the back plate 110 further includes a lower side wall 118 extending along an end of the back plate carrying portion 116 toward a third direction D3 away from the liquid crystal panel 200.
  • the fourth middle frame 164 includes a middle frame pressing portion 1641 extending parallel to the direction of the liquid crystal panel 200.
  • One side of the middle frame pressing portion 1641 is in contact with the side of the optical film 150 away from the back plate, and a panel tape 190 is provided on the side opposite to the side, and the panel tape 190 is used for bonding the liquid crystal panel 200.
  • the fourth middle frame 164 also includes an inserting arm 1643 perpendicular to the middle frame pressing portion 1641 and a front housing support wall 1642.
  • the inserting wall 1643 is close to the end of the middle frame pressing portion 1641.
  • One of the inserting arm 1643 and the front housing support wall 1642 A slot is formed therebetween, the inserting arm 1643 is inserted into the insertion hole 117 of the back plate 110, and the lower side wall 118 is located in the slot formed by the inserting arm 1643 and the front housing support wall 1642.
  • the front case 170 is pressed on the edge of the liquid crystal panel 200 to surround the end of the front case supporting wall 1642 away from the back plate 110 and the side away from the middle frame pressing portion 1641 to prevent light leakage and beautify the appearance.
  • FIG. 12 is a schematic diagram of the structure of the film tape 300
  • FIG. 13 is a cross-sectional view of the film tape 300 along the thickness direction of the film tape
  • FIG. 14 is a schematic diagram of a part of the structure of the liquid crystal display device after the liquid crystal panel 200 is removed
  • FIG. 15 is in FIG. Enlarged image at the circle.
  • the entirety of the film tape 300 is generally a belt-shaped structure, including a film tape main body 310, pointed heads 320 and 330 at both ends connected to the film tape main body 310, and a film
  • the notch portion 340 of the sheet tape body 310 is used to accommodate the protrusion 16313, and the notch portion 340 is used to avoid the protrusion 16313 on the middle frame, that is, the film tape 300 does not cover the protrusion.
  • the protrusion 16313 causes a greater reduction in the thickness caused by the support of the diaphragm tape 300. Therefore, when the diaphragm tape 300 does not cover the protrusion 16313, the protrusion caused by the diaphragm tape 300 is eliminated The thickness is reduced.
  • the pointed heads 302 and 303 are set to be pointed, mainly to facilitate the operator to peel off the film tape from the film tape carrier, and then fix the film tape on the diaphragm ears.
  • the film tape 300 includes a first substrate 301, a first adhesive 302, a second substrate 303, and a second adhesive 304 in sequence.
  • the first substrate 301 Compared with the second substrate 303, the first substrate 301 has higher compressibility, and the compression ratio is 40-60%.
  • foam is selected for the first substrate 301, and the compression ratio of the foam used is Is 50%.
  • the compression ratio of the second base material 303 is 10%.
  • the strength of the material used is greater, and the hardness is 50-90 degrees, which has a high-hardness filling function.
  • the second substrate is a silicone sheet with a hardness of 70 degrees.
  • the first adhesive 302 in the film tape 300 is located between the first substrate 301 and the second substrate 303 and is used to bond and fix the first substrate 301 and the second substrate 303 together. Since the two only need to be bonded and fixed together, the bonding strength of the first adhesive 302 is not high, and the first adhesive 302 can be a transparent tape.
  • the film tape 300 is located between the liquid crystal panel 200 and the film hanging ears 152.
  • the first substrate 301 is close to the liquid crystal panel 200.
  • the first substrate is made of foam material with a compression ratio of 50%.
  • the compression ratio of the panel tape 190 matches. In this way, the higher compression side of the film tape 300 is in contact with the liquid crystal panel 200 to prevent excessive hardness from causing damage to the liquid crystal panel 200.
  • the compression ratio of the first substrate 301 is equivalent to that of the panel tape, ensuring When the liquid crystal panel 200 is extruded in the thickness direction, it has substantially the same amount of deformation, and the edge of the liquid crystal display device is relatively flat.
  • the second substrate 303 is close to the diaphragm hanging ear 152, and the second adhesive 304 is bonded to the side of the second substrate 303 away from the first adhesive 302, and is used to bond the entire film
  • the sheet tape 300 is adhesively fixed to the middle frame 163.
  • the second adhesive has a greater bonding strength and is used to firmly bond and fix the diaphragm ears.
  • the outer periphery of the diaphragm tape 300 should be larger than that of the diaphragm hanging ears 152, that is, a part of the diaphragm tape 300 is adhered to the diaphragm carrying portion 16312 In this way, the diaphragm hanging ears 152 and the middle frame are bonded and fixed together, thereby realizing the bonding and fixing of the diaphragm.
  • FIG. 16 and FIG. 17 are schematic diagrams of the fixing method of the optical film in the related art display device
  • FIGS. 18A to 18D are process diagrams of the film jumping out of the related art display device.
  • the film tape 300' is a sticky foam, that is, compared to the film tape 300 of the present disclosure, the film tape 300' only includes a first substrate 301 and a second adhesive 304 connected to each other. .
  • the film tape 300 ′ has a generally strip-shaped structure as a whole, there is no notch 340, and a part of the film tape 300 ′ covers the protrusion 16313.
  • the film tape 300 in the embodiment of the present disclosure has two layers of substrates, and the hardness of the second layer of substrates is greater.
  • the thickness of the film tape 300 is not thin enough to make one end of the diaphragm hanger pass through the film The gap between the tape 300 and the upper end of the protrusion 16313 will not cause the diaphragm to jump out.
  • the film tape 300 in the embodiment of the present disclosure is not only suitable for direct-type display devices, but also suitable for side-type display devices.
  • FIG. 20 shows the film tape 300" in the side-type display device. Use cases.
  • the compressibility of the first substrate is greater than that of the second substrate, that is, the hardness of the second substrate is greater. Therefore, when the diaphragm ears are tilted, the Compared with the existing film tape, because the film tape has higher hardness, under the action of force, the thickness of the film tape is not thinned enough to make one end of the film hanger pass between the film tape and the upper end of the protrusion. This will not cause the diaphragm to jump out.

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Abstract

一种液晶显示装置（1000），涉及显示技术领域。液晶显示装置（1000）包括：中框（163），中框（163）包括膜片承载部（16312），膜片承载部（16312）上设置有突起（16313）；光学膜片（150），光学膜片（150）包括光学膜片本体（151）和连接于光学膜片本体（151）的膜片挂耳（152），膜片挂耳（152）放置于膜片承载部（16312），膜片挂耳（152）挂接于突起（16313）上；膜片胶带（300），膜片胶带（300）粘结于中框（163）上并覆盖光学膜片（150）的膜片挂耳（152）；其中，膜片胶带（300）在厚度方向上包括第一基材（301）和第二基材（303），第一基材（301）的压缩性大于第二基材（303）的压缩性，因膜片胶带（300）具有较高的硬度，在受力作用下，膜片胶带（300）的厚度减薄相对较小，不会导致光学膜片（150）跳出。

Description

一种液晶显示装置
相关申请的交叉引用
本申请要求在2019年04月09日提交中国专利局、申请号为201910281605.5、申请名称为“一种液晶显示装置”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；本申请要求在2019年04月09日提交中国专利局、申请号为201920471199.4、申请名称为“一种液晶显示装置”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
本公开涉及显示技术领域，尤其涉及一种液晶显示装置。
背景技术
液晶电视一般包括背光模组和液晶面板，根据背光模组中入光方式的不同，背光模组可分为直下式背光模组和侧入式背光模组。背光模组一般包括背板、中框、导光板或扩散板、以及位于导光板或扩散板出光侧的光学膜片，光学膜片主要用于聚光和提高亮度。为了保证光学膜片在整个电视装置中位置相对固定，往往会在光学膜片上设置膜片挂耳，通过膜片挂耳挂接到中框上的凸块来实现对光学膜片的固定，而为了增加固定效果，也会采用胶带来增强固定程度，但是目前仍然会出现膜片挂耳处膜片跳出的现象。
发明内容
本公开提供了一种液晶显示装置，能够防止光学膜片从膜片挂耳处跳出的问题。
本公开的液晶显示装置，包括：
中框，包括膜片承载部以及位于所述膜片承载部上的突起；
光学膜片，包括光学膜片本体和连接于所述光学膜片本体的膜片挂耳， 所述膜片挂耳放置于所述膜片承载部，所述膜片挂耳与所述突起挂接；
膜片胶带，与所述中框粘接并覆盖所述光学膜片的膜片挂耳，其中所述膜片胶带包括在厚度方向上布置的第一基材和第二基材，所述第一基材的压缩性大于所述第二基材的压缩性。
附图说明
为了更清楚地说明本公开实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开实施例提供的液晶显示装置的分解结构示意图；
图2为图1中示出的背板的结构示意图；
图3为图2中背板在E-E′处的剖面结构示意图；
图4为图1中示出的第三中框的立体结构示意图；
图5为图4的圆圈部分的放大图；
图6为本公开实施例提供的液晶显示装置的简易俯视图；
图7为图6中液晶显示装置在A-A′处的剖面结构示意图；
图8为图6中液晶显示装置在B-B′处的剖面结构示意图；
图9为图6中液晶显示装置在C-C′处的剖面结构示意图；
图10为图6中液晶显示装置在D-D′处的剖面结构示意图；
图11为图6中液晶显示装置在D-D′处的剖面立体结构示意图；
图12为本公开实施例的膜片胶带300的俯视图；
图13为本公开实施例的膜片胶带300沿着厚度方向的剖面图；
图14为本公开实施例的液晶显示装置去掉液晶面板后的部分结构示意图；
图15为图14种圆圈部分的放大图；
图16为相关技术的液晶显示装置去掉液晶面板后的部分结构示意图；
图17为相关技术的液晶显示装置在膜片挂耳处的剖面图；
图18A-图18D为相关技术的液晶显示装置膜片跳出的过程图；
图19为本公开实施例的液晶显示装置膜片未跳出的过程示意图；
图20为本公开另一实施例的液晶显示装置在膜片挂耳处的剖面图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”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公开和简化描述，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公开的限制。
在本公开的描述中，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，可以是接触连接，也可以是可拆卸连接，或一体地连接；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公开中的具体含义。
图1是根据本公开实施例的液晶显示装置的分解透视图。
参照图1，液晶显示装置1000包括背光模组和液晶面板200。
当在平面图中观察时，液晶显示装置1000为具有短边和长边的矩形形状，短边的方向被称作第一方向D1，长边的方向被称作第二方向D2。第二方向D2基本上与第一方向D1垂直。背光模组和液晶面板200沿着基本上与第一方向D1和第二方向D2的平面正交的第三竖直方向D3顺序地堆叠。
沿着液晶显示装置1000中光线的出光方向，背光模组依次包括起到支撑作用的背板110、光源120、反射片130、扩散板140和光学膜片150、膜片胶带300。
光源120产生光，其包括沿第二方向D2设置的多个LED灯条121，多个LED灯条121之间大致平行设置。灯条121包括电路板1211和位于电路板121一侧的多个LED灯1212，电路板1211的另一侧与背板110接触，灯条121通过连接部件固定于背板110上。
反射片130用于将光线反射到出光方向上。反射片130固定于背板110的表面，反射片130上设置有多个使LED灯1212外露的通孔。
扩散板140将来自光源120的光线进行折射和反射，进而实现对光线的均匀化。
光学膜片150通常包括一个或多个膜片，主要用于聚光和提高亮度。
另外，背光模组100还包括位于背板110上且用于支撑扩散板140的扩散板支架，由此保证液晶显示装置1000的混光距离。
除此之外，背光模组100还包括位于反射片130、扩散板140和光学膜片150边缘的中框组件160，中框组件160包括基本上平行于第一方向D1的第一中框161和第二中框162，基本上平行于第二方向D2的第三中框163和第四中框164，第四中框164和前壳170配合连接。中框组件160中各个中框之间通过拼接形式组装，可选地，第一、二、三中框也可以一体成型。第一中框161、第二中框162、第三中框163和背板110之间设置有中框胶带180，这样，中框组件160通过中框胶带180固定于背板110上。中框组件170和液晶面板200之间设置有面板胶带190，液晶面板200通过面板胶带190固定到中框组件160。
膜片胶带300一面具有粘性，其设置位置对应于光学膜片150的边缘，本公开实施例中，膜片胶带300对应设置于光学膜片150的膜片挂耳处，位于光学膜片150和液晶面板200之间，用于将光学膜片150固定于中框组件上。
虽然在图1中未示出，但是显示装置1000还可以包括结合到背板110的远离液晶面板200一侧的后壳(未示出)。
图2是图1中示出的背板110的立体结构示意图，图3是图2的背板在 E-E′处的剖面示意图。
参照图2和图3，背板110包括底部111和沿液晶显示装置1000的第三方向D3延伸的第一侧壁112、第二侧壁113和第三侧壁114，第一侧壁112和第二侧壁113大致平行于第一方向D1，第三侧壁114大致平行于第二方向D2，底部111平行于液晶面板200所在的方向。
以第三侧壁114为例，第三侧壁114包括沿液晶显示装置1000的第三方向D3向相反方向延伸的第一子侧壁1141和第二子侧壁1142，第二子侧壁1142位于背板110的内侧，第一子侧壁1141和第二子侧壁1142之间通过侧壁连接部1143相连，第一子侧壁1141、第二子侧壁1142和侧壁连接部1143一体连接，第二子侧壁1142通过一体折弯的方式形成，如此，通过折弯工艺的加工过程增强了背板110的强度。
同时，为了保证一定的混光距离和外观效果，背板110还包括在底部111和侧壁之间的背板连接部115，背板连接部115包括与底部111的边缘连接的斜面部1151、与第一侧壁112或第二侧壁113或第三侧壁114的一端连接的平台部1152以及连接斜面部1151和平台部1152的过渡部1153。斜面部1151相对于底部111倾斜的角度θ在大约20至大约50度的范围内，曲线优化的设计使得显示装置外观上更加轻薄，实现了良好的外观效果。平台部1152所在的平面大致垂直于第三方向D3，平行于液晶面板200所在的平面，过渡部1153所在平面大致平行于第三方向D3，斜面部、过渡部和平台部的三段设计减小了背板在实际生产过程中的加工工艺难度。
需要说明的是，背板110中第一侧壁112侧、第二侧壁113侧和第四侧壁114侧具有大致相同的结构。
背板110中底部111、第一侧壁112、第二侧壁113、第三侧壁114以及连接部115为一体结构，即背板110为一体成型结构。在加工工艺上，可采用一体折弯的方式进行加工，一是可增强背板110的强度，二是具有良好的外观效果。
此外，因背板110包括一体成型的三个侧壁，为了装配的需要，除三个 侧壁之外的第四边未设置如上的侧壁结构，便于扩散板以及膜片的组装。
图4是图1中示出的第三中框163的立体结构示意图，图5是图4中圆圈部分的放大图。
参照图4、5所示，第三中框163整体形成一槽状结构，第三中框163包括垂直于第三方向D3、相对设置的第一承载部1631和第二承载部1632、连接于第一承载部1631和第二承载部1632之间的中框连接部1633，第一承载部1631、第二承载部1632和中框连接部1633三者围成一槽状结构。
第一承载部1631包括面板承载部16311和膜片承载部16312，根据液晶显示装置1000的层叠关系，面板承载部16311和膜片承载部16312具有一定的高度差，构成台阶形状，膜片承载部16312靠近第一承载部1631的末端。膜片承载部16312还设置有突起16313，膜片挂耳挂接到突起16313上，实现对膜片的固定。
第三中框163还包括沿第二承载部1632的一端延伸，相对于第二承载部1632成角度α的反射片承载部1634，角度α设置成大约20度至50度的范围内。反射片承载部1634用于承载反射片130，反射片130可通过粘结等方式固定于反射片承载部1634，用于实现对反射片130的支撑和固定。
另外，第三中框还包括沿反射片承载部1634的一端延伸的支撑部1635。支撑部1635朝着远离第一承载部1631的方向延伸，支撑部1635所在平面大致平行于第三方向，支撑部1635与背板接触，起到支撑作用，以防止中框内翻。
需要说明的是，第一中框161和第二中框162与第三中框163的结构大致相同，与第三中框163不同的是，第一中框161和第二中框162上不包括膜片承载部16312，具体结构可参考图9-10中的说明。
以下对液晶显示装置1000中各部件装配后的相对位置关系进行说明。
图6是液晶显示装置1000的简易俯视图，图7是液晶显示装置1000在A-A′处的剖面示意图，A-A′处正好对应于膜片挂耳的位置。
从图7中可以看出，液晶显示装置1000包括背板110，反射片130，扩 散板140，光学膜片150、第三中框163和液晶面板200。
第三中框163位于背板110的侧壁114靠近底部111的一侧，第三中框163包括相对设置的第一承载部1631和第二承载部1632以及连接于第一承载部1631和第二承载部1632之间的中框连接部1633，第一承载部1631、第二承载部1632和中框连接部1633三者围成一槽状结构，扩散板140位于所述槽状结构内，第一承载部1631承载液晶面板200。中框设置于背板的侧壁靠近底部的一侧，液晶面板放置于中框的第一承载部，扩散板放置于相对设置的第一承载部和第二承载部与中框连接部形成的槽状结构内，如此，在该侧无需设置边框即可保证液晶显示装置中的内部部件不外露，且还将扩散板和液晶面板等实现了固定，实现了液晶显示装置的无边框设计。
第三侧壁114包括一体连接的第一子侧壁1141、侧壁连接部1143和第二子侧壁1142，三者通过一体折弯方式形成，第三中框163位于第二子侧壁1142远离第一子侧壁的一侧，如此组装后，相比于第三侧壁只包括第一子侧壁1141的情形，裸露在外的为侧壁连接部1143，而非第一子侧壁的端部，侧壁连接部1143为平滑过渡的曲面，具有良好的外观形态，可通过直接在第一子侧壁1141和侧壁连接部1143上喷涂直接将两者作为外观面。
第三中框163位于背板110和液晶面板200之间，背板110的平台部1152与第三中框的第二承载部1632之间设置有中框胶带180，用于将第三中框163固定到背板110。
反射片130位于第三中框163的反射片承载部1634上，反射片130的边缘位于第二承载部1632，因反射片承载部1634相对于第二承载部1632成角度α，相应地，反射片130也与第二承载部1632成角度α，即反射片130相对于底部111成角度α，α的角度范围为20到50度，优选30度，相比于将反射片130直接贴设于背板110上，有更多的光源光线被反射回显示装置的显示区域，利于提高显示装置的显示亮度。
第三中框163还包括连接于反射片承载部1634一端的支撑部1635，支撑部1635与背板110的斜面部1151相接触，起到支撑作用，用于防止中框内 翻。
扩散板140位于第二承载部1632靠近液晶面板200的一侧，即扩散板140插设于第一承载部1631、第二承载部1632和中框连接部1633形成的槽状结构中。
第三中框163的第一承载部1631位于扩散板140和液晶面板200之间。光学膜片150放置于膜片承载部16312，光学膜片150包括光学膜片本体151和连接于所述光学膜片本体的膜片挂耳152，膜片挂耳152挂接于突起16313上，膜片挂耳152还设置有膜片固定胶带300，用于将光学膜片150固定于膜片承载部16312。液晶面板200与面板承载部16311之间设置有面板胶带190，由此实现将液晶面板200固定到第三中框163。
图8是液晶显示装置1000在B-B′处的剖面示意图，B-B′处正好对应于无膜片挂耳的位置。
与图7中有膜片挂耳不同的是，膜片承载部16312上没有设置突起16313，其余结构与图7中所示结构相同，在此不再赘述。
图9是液晶显示装置1000在C-C′处的剖面示意图。与图7-8中所示结构不同的是，中框的第一承载部1631不包括膜片承载部16312，仅包括面板承载部16311，光学膜片150与中框之间无配合结构，中框只是起到限制膜片位置的作用。
图10、图11是液晶显示装置1000在D-D′处的剖面示意图。
从图10、图11中可以看出，在该侧，液晶显示装置1000包括背板110、反射片130、扩散板140、光学膜片150、第四中框164，液晶面板200和前壳170。第四中框164位于反射片130、扩散板140和光学膜片150的边缘。
背板110包括背板承载部116，用于承载反射片130、扩散板140和光学膜片150，反射片130、扩散板140和光学膜片150依次层叠设置。背板承载部116上还包括插孔117。
背板110还包括沿着背板承载部116的一端向着远离液晶面板200的第三方向D3延伸的下侧壁118。
第四中框164包括平行于液晶面板200方向延伸的中框压置部1641。中框压置部1641的一侧与光学膜片150远离背板的一侧接触，与该侧相对的一侧上设置有面板胶带190，面板胶带190用于粘结液晶面板200。
第四中框164还包括垂直于中框压置部1641的插臂1643和前壳支撑壁1642，插壁1643靠近中框压置部1641的端部，插臂1643和前壳支撑壁1642之间形成一插槽，插臂1643插入背板110的插孔117中，下侧壁118位于插臂1643和前壳支撑壁1642形成的插槽中。
前壳170压设于液晶面板200的边缘，包围前壳支撑壁1642远离背板110的一端和远离中框压置部1641的一侧，以防止漏光和美化外观。
接下来对膜片胶带300的结构形态进行说明。
图12是膜片胶带300的结构示意图，图13是膜片胶带300沿膜片胶带厚度方向的剖面图，图14为液晶显示装置去除液晶面板200后的部分结构示意图，图15是图14中圆圈处的放大图。
如图12、14-15所示，膜片胶带300整体大致呈带状结构，包括膜片胶带本体310，连接于膜片胶带本体310的、位于两端的尖头部320和330，以及位于膜片胶带本体310上用于收纳突起16313的缺口部340，缺口部340用于避让中框上的突起16313，即膜片胶带300不覆盖突起。相比于中框163其他部分，突起16313对膜片胶带300的顶持造成的厚度减薄程度较大，因此，当膜片胶带300不覆盖突起16313时，消除了膜片胶带300因突起导致的厚度减薄。
尖头部302和303之所以设置为尖头，主要是便于操作人员从膜片胶带承载体上剥离膜片胶带，进而将膜片胶带固定于膜片挂耳处。
如图13所示，沿膜片的厚度方向，膜片胶带300依次包括第一基材301、第一背胶302、第二基材303和第二背胶304。
相比于第二基材303，第一基材301具有较高的压缩性，压缩比为40-60％，在本公开实施例中第一基材301选用泡棉，所用泡棉的压缩比为50％。第二基材303的压缩比为10％，相比于第一基材，所用材料的强度大，硬度在50-90 度，起到了高硬度填充功能。在本公开实施例中，第二基材选用硬度70度的硅胶片。
膜片胶带300中的第一背胶302位于第一基材301和第二基材303之间，用于将第一基材301和第二基材303粘结固定在一起。因仅需将两者粘结固定在一起，故第一背胶302的粘结强度要求不高，第一背胶302可采用透明胶带。
结合图7所示，膜片胶带300位于液晶面板200和膜片挂耳152之间，第一基材301靠近液晶面板200，第一基材选用压缩比为50％的泡棉材料，其与面板胶带190的压缩比匹配。如此，膜片胶带300中压缩比较高的一侧与液晶面板200接触，防止硬度过大对液晶面板200造成伤害，再者，第一基材301的压缩比与面板胶带的压缩比相当，保证了液晶面板200在厚度方向进行挤压时，具有大体相同的形变量，液晶显示装置的边缘比较平坦。
相比于第一基材301，第二基材303靠近膜片挂耳152处，第二背胶304粘结于第二基材303远离第一背胶302的一侧，用于将整个膜片胶带300粘结固定于中框163上。相比于第一背胶302，第二背胶具有较大的粘结强度，用于将膜片挂耳牢靠地粘结固定。为了保证将膜片挂耳粘结固定于中框163上，膜片胶带300的外周缘要大于膜片挂耳152的外周缘，即膜片胶带300的一部分粘结于膜片承载部16312上，从而实现将膜片挂耳152与中框粘结固定在一起，进而实现了膜片的粘结固定。
以下将结合相关技术中膜片胶带对光学膜片的固定方式来说明本公开中的膜片胶带的技术效果。图16、图17是相关技术的显示装置中光学膜片的固定方式示意图，图18A-图18D是相关技术的显示装置中膜片跳出的过程图。
相关技术中，膜片胶带300'为带有粘性的泡棉，即相比于本公开的膜片胶带300，膜片胶带300'只包含相互连接的第一基材301和第二背胶304。
从图16-图17和图18A-图18D中可以看出，膜片胶带300'整体大致呈带状结构，不存在缺口部340，且膜片胶带300'的部分区域覆盖突起16313。
如图18A所示，当膜片挂耳受力倾斜时，因膜片胶带300'为泡棉，具有 比较高的压缩性，在受力作用下，如图18B所示，膜片胶带300'的厚度会减薄，当膜片胶带300'的厚度减薄时，膜片胶带300'与突起16313上端之间的间隙变大，由此，如图18C所示，膜片挂耳152的一端则会慢慢通过膜片胶带300'与突起16313上端之间的间隙，随着时间的推移，如图18D所示，膜片挂耳152带着膜片胶带300'从突起16313上脱落，最终导致膜片跳出。
与相关技术相比，如图19所示，本公开实施例中的膜片胶带300因具有两层基材，且第二层基材的硬度较大，因此，当膜片挂耳受力倾斜时，相比于现有的膜片胶带，因膜片胶带300具有较高的硬度，在受力作用下，膜片胶带300的厚度减薄程度不足以使得膜片挂耳的一端通过膜片胶带300与突起16313上端之间的间隙，由此不会导致膜片跳出。
需要说明的，本公开实施例中的膜片胶带300不仅适用于直下式显示装置，也适用于侧入式显示装置，图20中示出的是膜片胶带300”在侧入式显示装置中的使用情形。
根据以上内容，在该液晶显示装置中，第一基材的压缩性大于第二基材的压缩性，即第二基材的硬度较大，因此，当膜片挂耳受力倾斜时，相比于现有的膜片胶带，因膜片胶带具有较高的硬度，在受力作用下，膜片胶带的厚度减薄程度不足以使得膜片挂耳的一端通过膜片胶带与突起上端之间的间隙，由此不会导致膜片跳出。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种液晶显示装置，包括：
    中框，包括膜片承载部以及位于所述膜片承载部上的突起；
    光学膜片，包括光学膜片本体和连接于所述光学膜片本体的膜片挂耳，所述膜片挂耳放置于所述膜片承载部，所述膜片挂耳与所述突起挂接；
    膜片胶带，与所述中框粘接并覆盖所述光学膜片的膜片挂耳，其中所述膜片胶带包括在厚度方向上布置的第一基材和第二基材，所述第一基材的压缩性大于所述第二基材的压缩性。
  2. 根据权利要求1所述的液晶显示装置，所述膜片胶带包括膜片胶带本体，所述膜片胶带本体包括用于收纳所述突起的缺口部。
  3. 根据权利要求2所述的液晶显示装置，所述膜片胶带还包括连接于所述膜片胶带本体、位于两端的尖头部。
  4. 根据权利要求1所述的液晶显示装置，所述膜片胶带还包括位于所述第一基材和所述第二基材之间的第一背胶和用于粘结固定第二基材和所述中框的第二背胶。
  5. 根据权利要求4所述的液晶显示装置，所述第二背胶的粘结性大于所述第一背胶的粘结性。
  6. 根据权利要求1所述的液晶显示装置，相较于所述第一基材，所述第二基材靠近所述中框。
  7. 根据权利要求1所述的液晶显示装置，所述第一基材的压缩比为40-60％。
  8. 根据权利要求1中所述的液晶显示装置，所述第二基材的硬度在50-90度。
  9. 根据权利要求1所述的液晶显示装置，所述第一基材为泡棉，第二基材为硅胶片。
  10. 根据权利要求1中所述的液晶显示装置，所述液晶显示装置为直下 式显示装置或侧入式显示装置。
PCT/CN2019/129298 2019-04-09 2019-12-27 一种液晶显示装置 WO2020207060A1 (zh)

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