CN110007517A - A liquid crystal display device - Google Patents

Abstract

The invention discloses a kind of liquid crystal display devices, are related to field of display technology.Liquid crystal display device, comprising: center, the center include diaphragm supporting part, are provided with protrusion on the diaphragm supporting part；Optical diaphragm, optical diaphragm include optical diaphragm ontology and the diaphragm hangers for being connected to the optical diaphragm ontology, and the diaphragm hangers is placed in the diaphragm supporting part, and the diaphragm hangers is mounted in the protrusion；Diaphragm adhesive tape, the diaphragm adhesive tape are bonded on the center and cover the diaphragm hangers of the optical diaphragm；Wherein the diaphragm adhesive tape includes first base material and the second substrate in a thickness direction, the compressibility of the first base material is greater than the compressibility of second substrate, because of diaphragm adhesive tape hardness with higher, under stress effect, the thickness of diaphragm adhesive tape is thinned relatively small, not will lead to diaphragm and jumps out.

Description

A liquid crystal display device

technical field

The present invention relates to the field of display technology, and in particular, to a liquid crystal display device.

Background technique

An LCD TV generally includes a backlight module and a liquid crystal panel. According to the different light incident modes 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 backplane, a middle frame, a light guide plate or a diffuser plate, and an optical film located on the light-emitting side of the light guide plate or diffuser plate. The optical film is mainly used for concentrating light and improving brightness. In order to ensure that the position of the optical film is relatively fixed in the entire TV device, film hanging ears are often set on the optical film, and the optical film is fixed by hooking the film hanging ears to the bumps on the middle frame. In order to increase the fixing effect, tape is also used to enhance the degree of fixation, but at present, the phenomenon of the diaphragm jumping out at the hanging ear of the diaphragm still occurs.

SUMMARY OF THE INVENTION

The invention provides a liquid crystal display device, which can prevent the problem that the optical film jumps out from the hanging ear of the film.

The liquid crystal display device of the present invention includes: a middle frame, the middle frame includes a film support part, and protrusions are provided on the film support part; an optical film, the optical film includes an optical film body and is connected to the The diaphragm mounting lug of the optical diaphragm body, the diaphragm mounting lug is placed on the diaphragm carrying part, and the diaphragm mounting lug is hung on the protrusion; diaphragm tape, the diaphragm adhesive tape is bonded A film hanging lug on the middle frame and covering the optical film; wherein the film tape includes a first base material and a second base material in the thickness direction, and the compressibility of the first base material is greater than Compressibility of the second substrate.

According to the above, in the liquid crystal display device, the compressibility of the first substrate is greater than the compressibility of the second substrate, that is, the hardness of the second substrate is relatively large, therefore, when the diaphragm hanger is inclined under stress , Compared with the existing diaphragm tape, due to the high hardness of the diaphragm tape, under the action of force, the thickness of the diaphragm tape is not thin enough to make one end of the diaphragm hanging ear pass through the diaphragm tape and the protrusion. gap between the upper ends, thus not causing the diaphragm to jump out.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic diagram of an exploded structure of a liquid crystal display device according to an embodiment of the present invention;

Fig. 2 is the structural representation of the backplane shown in Fig. 1;

Fig. 3 is the cross-sectional structure schematic diagram of the back plate at E-E' in Fig. 2;

Fig. 4 is the three-dimensional structure schematic diagram of the third middle frame shown in Fig. 1;

Fig. 5 is the enlarged view of the circled part of Fig. 4;

6 is a simplified top view of a liquid crystal display device according to an embodiment of the present invention;

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 cross-sectional structure diagram of the liquid crystal display device in FIG. 6 at C-C′;

FIG. 10 is a schematic cross-sectional structure diagram of the liquid crystal display device at D-D′ in FIG. 6;

FIG. 11 is a schematic cross-sectional three-dimensional structure diagram of the liquid crystal display device at D-D' in FIG. 6 .

FIG. 12 is a top view of the film tape 300 according to the embodiment of the present invention;

13 is a cross-sectional view of the film tape 300 according to the embodiment of the present invention along the thickness direction;

FIG. 14 is a partial structural schematic diagram of the liquid crystal display device according to the embodiment of the present invention after removing the liquid crystal panel;

Figure 15 is an enlarged view of the circled part of Figure 14;

16 is a partial structural schematic diagram of a liquid crystal display device in the prior art after removing the liquid crystal panel;

17 is a cross-sectional view of a liquid crystal display device in the prior art at the mounting lug of the diaphragm;

18A-18D are process diagrams showing the jumping out of the diaphragm of the liquid crystal display device in the prior art;

FIG. 19 is a schematic diagram of a process in which the membrane of the liquid crystal display device according to the embodiment of the present invention does not jump out;

FIG. 20 is a cross-sectional view of the liquid crystal display device of another embodiment of the present invention at the mounting ear of the diaphragm.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a contact connection or a detachable connection. connected, or integrally connected; those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

Referring to FIG. 1 , a liquid crystal display device 1000 includes a backlight module and a liquid crystal panel 200 .

When viewed in a plan view, the liquid crystal display device 1000 has a rectangular shape having short sides and long sides, the direction of the short sides being referred to as a first direction D1, and the direction of the long sides being referred to as a 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 and second directions D1 and D2.

Along the emitting direction of the light in the liquid crystal display device 1000 , the backlight module sequentially includes a backplane 110 , a light source 120 , a reflection sheet 130 , a diffuser plate 140 , an optical film 150 , and a film tape 300 that play a supporting role.

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 backplane 110 , and the light bar 121 is fixed on the backplane 110 by connecting components.

The reflection sheet 130 is used to reflect the light to the light-emitting direction. The reflection sheet 130 is fixed on the surface of the backplane 110 , and a plurality of through holes for exposing the LED lamps 1212 are provided on the reflection sheet 130 .

The diffuser plate 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, mainly for concentrating light and improving brightness.

In addition, the backlight module 100 further includes a diffuser plate bracket located on the back plate 110 and used to support the diffuser plate 140 , thereby ensuring the light mixing distance of the liquid crystal display device 1000 .

Besides, 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. With the second middle frame 162, the third middle frame 163 and the fourth middle frame 164 are substantially parallel to the second direction D2, and the fourth middle frame 164 is connected with the front case 170 in a matched manner. Each middle frame in the middle frame assembly 160 is assembled by splicing, optionally, the first, second and third middle frames can also be integrally formed. A middle frame tape 180 is disposed 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 disposed 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 .

One side of the film tape 300 is sticky, and its setting position corresponds to the edge of the optical film 150. In the embodiment of the present invention, the film tape 300 is correspondingly arranged 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.

Although not shown in FIG. 1 , the display device 1000 may further include a rear case (not shown) coupled to a side of the back plate 110 away from the liquid crystal panel 200 .

FIG. 2 is a schematic three-dimensional structure diagram of the backplane 110 shown in FIG. 1 , and FIG. 3 is a cross-sectional schematic diagram of the backplane at E-E′ of FIG. 2 .

Referring to FIGS. 2 and 3 , the backplane 110 includes a bottom 111 and a first side wall 112 , a second side wall 113 and a third side wall 114 extending along a 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 in which the liquid crystal panel 200 is located.

Taking the third sidewall 114 as an example, the third sidewall 114 includes a first subsidewall 1141 and a second subsidewall 1142 extending in opposite directions along the third direction D3 of the liquid crystal display device 1000 , and the second subsidewall 1142 Located on the inner side of the backplane 110, the first sub-sidewall 1141 and the second sub-sidewall 1142 are connected by a side-wall connecting portion 1143, and the first sub-sidewall 1141, the second sub-sidewall 1142 and the side-wall connecting portion 1143 are integrated For connection, the second sub-sidewall 1142 is formed by integrally bending, so that the strength of the back plate 110 is enhanced through the processing of the bending process.

At the same time, in order to ensure a certain light mixing distance and appearance effect, the backplane 110 further includes a backplane connecting portion 115 between the bottom 111 and the sidewall, and the backplane connecting portion 115 includes a sloped 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 sloped portion 1151 and the platform portion 1152. The inclined angle θ of the inclined portion 1151 relative to the bottom portion 111 is in the range of about 20 to about 50 degrees, and the curve-optimized design makes the display device lighter and thinner in appearance, and achieves a good appearance effect. The plane where the platform portion 1152 is located is approximately perpendicular to the third direction D3 and parallel to the plane where the liquid crystal panel 200 is located. The plane where the transition portion 1153 is located is approximately parallel to the third direction D3, and the three-stage design of the inclined portion, the transition portion and the platform portion is reduced. The processing technology difficulty of the backplane in the actual production process is eliminated.

It should be noted that the 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 in the back plate 110 are an integral structure, that is, the back plate 110 is an integral structure. In terms of processing technology, it can be processed by means of integral bending, one is to enhance the strength of the back plate 110, and the other is to have a good appearance effect.

In addition, since the back plate 110 includes three side walls that are integrally formed, for assembly purposes, the fourth side other than the three side walls is not provided with the above-mentioned side wall structure, which facilitates the assembly of the diffuser plate and the diaphragm.

FIG. 4 is a schematic three-dimensional structure 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 .

4 and 5 , the third middle frame 163 integrally forms a groove-like structure, and the third middle frame 163 includes a first bearing portion 1631 and a second bearing portion 1632 that are perpendicular to the third direction D3 and are oppositely disposed, and are connected to 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 form a groove-like structure.

The first carrying part 1631 includes a panel carrying part 16311 and a film carrying part 16312. According to the lamination relationship of the liquid crystal display device 1000, the panel carrying part 16311 and the film carrying part 16312 have a certain height difference, forming a stepped shape. 16312 is close to the end of the first bearing portion 1631 . The diaphragm bearing portion 16312 is also provided with a protrusion 16313, and the diaphragm hanging ear is hooked to the protrusion 16313 to realize the fixing of the diaphragm.

The third middle frame 163 further includes a reflective sheet carrying portion 1634 extending along one end of the second carrying portion 1632 and forming an angle α relative to the second carrying portion 1632 , and the angle α is set in the range of about 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 means of bonding or the like, so as to support and fix the reflective sheet 130 .

In addition, the third middle frame further includes a support portion 1635 extending along one end of the reflective sheet bearing portion 1634 . The support portion 1635 extends away from the first bearing portion 1631 . The plane of the support portion 1635 is substantially parallel to the third direction. The support portion 1635 contacts the back plate and plays a supporting role to prevent the middle frame from turning inward.

It should be noted that the structures of the first middle frame 161 and the second middle frame 162 are substantially the same as those 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 Including the diaphragm carrying part 16312, the specific structure can refer to the description in FIGS. 9-10.

The relative positional relationship of the components in the liquid crystal display device 1000 after being assembled will be described below.

FIG. 6 is a simplified top view of the liquid crystal display device 1000 , and FIG. 7 is a schematic cross-sectional view of the liquid crystal display device 1000 at A-A′, where A-A′ just corresponds to the position of the mounting lug of the diaphragm.

As can be seen from FIG. 7 , the liquid crystal display device 1000 includes a backplane 110 , a reflection sheet 130 , a diffusion 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 , and the third middle frame 163 includes a first bearing portion 1631 and a second bearing portion 1632 arranged opposite to each other and connected to the first bearing portion 1631 and the first bearing portion 1631 and the second bearing portion 1632 . The middle frame connecting portion 1633 between the two bearing portions 1632, the first bearing portion 1631, the second bearing portion 1632 and the middle frame connecting portion 1633 form a groove-like structure, and the diffuser plate 140 is located in the groove-like 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 close to the bottom, the liquid crystal panel is placed on the first bearing part of the middle frame, and the diffusion plate is placed on the first bearing part and the second bearing part which are arranged opposite to the connection part of the middle frame. In the groove-like structure, there is no need to set a frame on this side to ensure that the internal components of the liquid crystal display device are not exposed, and the diffusion plate and the liquid crystal panel are also fixed, 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, and 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-sidewall, after being assembled in this way, compared to the case where the third sidewall only includes the first sub-sidewall 1141, the exposed sidewall connecting portion 1143 is not the first sub-sidewall At the end, the side wall connecting portion 1143 is a smoothly transitioned curved surface with good appearance. The first sub-side wall 1141 and the side wall connecting portion 1143 can be directly used as appearance surfaces by spraying directly on them.

The third middle frame 163 is located between the backplane 110 and the liquid crystal panel 200 , and a middle frame tape 180 is provided between the platform portion 1152 of the backplane 110 and the second bearing portion 1632 of the third middle frame for attaching the third middle frame 163 is secured to the back plate 110 .

The reflective sheet 130 is located on the reflective sheet supporting portion 1634 of the third middle frame 163, and the edge of the reflective sheet 130 is located on the second supporting portion 1632. Because the reflective sheet supporting portion 1634 forms an angle α relative to the second supporting portion 1632, correspondingly, the reflective sheet The sheet 130 also forms an angle α with the second bearing portion 1632, that is, the reflective sheet 130 forms an angle α with respect to the bottom 111, and the angle range of α is 20 to 50 degrees, preferably 30 degrees. On the backplane 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 further includes a support portion 1635 connected to one end of the reflective sheet bearing portion 1634. The support portion 1635 is in contact with the sloped portion 1151 of the back plate 110 to support and prevent the middle frame from turning inward.

The diffusion plate 140 is located on the side of the second bearing 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 bearing portion 1631 , the second bearing portion 1632 and the middle frame connecting portion 1633 .

The first bearing 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 carrying portion 16312. The optical film 150 includes an optical film body 151 and a film mounting lug 152 connected to the optical film body. The film hanging lug 152 is hooked on the protrusion 16313. The film mounting lugs 152 are further provided with a film fixing tape 300 for fixing the optical film 150 to the film carrying portion 16312 . A panel adhesive tape 190 is disposed between the liquid crystal panel 200 and the panel carrying portion 16311 , so that the liquid crystal panel 200 is fixed to the third middle frame 163 .

FIG. 8 is a schematic cross-sectional view of the liquid crystal display device 1000 at the position B-B', and the position B-B' just corresponds to the position of the mounting lug without the diaphragm.

The difference from the mounting ears of the diaphragm in FIG. 7 is that the protrusions 16313 are not provided on the diaphragm bearing portion 16312 , and the rest of the structures are the same as those shown in FIG. 7 , and will not be repeated here.

FIG. 9 is a schematic cross-sectional view of the liquid crystal display device 1000 at C-C′. Different from the structure shown in FIGS. 7-8 , 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.

10 and 11 are schematic cross-sectional views of the liquid crystal display device 1000 at D-D'.

As can be seen from FIGS. 10-11 , on this side, 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 reflection sheet 130 , the diffuser plate 140 and the optical film 150 .

The backplane 110 includes a backplane bearing portion 116 for supporting the reflection sheet 130 , the diffuser plate 140 and the optical film 150 . The reflection sheet 130 , the diffuser plate 140 and the optical film 150 are stacked in sequence. The backplane bearing portion 116 further includes a socket 117

The backplane 110 further includes a lower side wall 118 extending along one end of the backplane bearing 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 backplane, and the side opposite to the side is provided with a panel tape 190 for bonding the liquid crystal panel 200 .

The fourth middle frame 164 also includes an insertion arm 1643 perpendicular to the middle frame pressing portion 1641 and a front case supporting wall 1642, the insertion wall 1643 is close to the end of the middle frame pressing portion 1641, and the insertion arm 1643 and the front case supporting wall 1642 are inserted. A slot is formed therebetween, the insertion arm 1643 is inserted into the insertion hole 117 of the backplane 110 , and the lower side wall 118 is located in the slot formed by the insertion arm 1643 and the support wall 1642 of the front case.

The front case 170 is pressed on the edge of the liquid crystal panel 200 to surround the end of the front case support 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.

Next, the configuration of the diaphragm tape 300 will be described.

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, and FIG. Enlarged image at the circle.

As shown in FIGS. 12 , 14-15 , the film tape 300 is generally in a belt-like structure as a whole, including a film tape body 310 , pointed parts 320 and 330 at both ends connected to the film tape body 310 , and The notch portion 340 on the body 310 of the sheet tape is used to avoid the protrusion 16313 on the middle frame, that is, the film tape 300 does not cover the protrusion. Compared with other parts of the middle frame 163, the thickness reduction caused by the protrusions 16313 on the diaphragm tape 300 is greater. Therefore, when the diaphragm tape 300 does not cover the protrusions 16313, the protrusions caused by the diaphragm tape 300 are eliminated. thickness is reduced.

The reason why the pointed parts 302 and 303 are set to be pointed is mainly to facilitate the operator to peel off the film tape from the film tape carrier body, and then fix the film tape to the hanging ear of the film film.

As shown in FIG. 13 , along the thickness direction of the film, the film tape 300 includes a first substrate 301 , a first adhesive 302 , a second substrate 303 and a second adhesive 304 in sequence.

Compared with the second base material 303, the first base material 301 has higher compressibility, and the compression ratio is 40-60%. is 50%. The compression ratio of the second base material 303 is 10%. Compared with the first base material, the used material has a high strength and a hardness of 50-90 degrees, which has a high hardness filling function. In the embodiment of the present invention, the second substrate is a silica gel sheet with a hardness of 70 degrees.

The first back glue 302 in the film tape 300 is located between the first substrate 301 and the second substrate 303, and is used for bonding and fixing 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 tape 302 is not high, and the first adhesive tape 302 can be made of transparent tape.

As shown in FIG. 7 , the diaphragm tape 300 is located between the liquid crystal panel 200 and the diaphragm mounting lugs 152 , the first substrate 301 is close to the liquid crystal panel 200 , and the first substrate is a foam material with a compression ratio of 50%, which is similar to The compression ratio of the panel tape 190 is matched. In this way, the side of the film tape 300 with a higher compression ratio is in contact with the liquid crystal panel 200 to prevent damage to the liquid crystal panel 200 caused by excessive hardness. Furthermore, the compression ratio of the first substrate 301 is equal to that of the panel tape. It is ensured that when the liquid crystal panel 200 is squeezed in the thickness direction, it has substantially the same amount of deformation, and the edge of the liquid crystal display device is relatively flat.

Compared with the first base material 301, the second base material 303 is close to the film hanging ear 152, and the second adhesive 304 is bonded to the side of the second base material 303 away from the first adhesive 302, so as to attach the entire film The sheet tape 300 is adhered and fixed on the middle frame 163 . Compared with the first back glue 302, the second back glue has a larger bonding strength, and is used for firmly bonding and fixing the membrane hanging lugs. In order to ensure that the diaphragm mounting lugs are bonded and fixed on the middle frame 163, the outer periphery of the diaphragm tape 300 should be larger than the outer periphery of the diaphragm mounting lugs 152, that is, a part of the diaphragm adhesive tape 300 is bonded to the diaphragm bearing portion 16312. , so as to realize the bonding and fixing of the diaphragm hanging lugs 152 and the middle frame, thereby realizing the bonding and fixing of the diaphragm.

The technical effect of the film tape in the present invention will be described below in conjunction with the fixing method of the film tape to the optical film in the prior art. 16-17 are schematic diagrams of the fixing method of the optical film in the display device of the prior art, and FIGS. 18A-18D are the process diagrams of the film jumping out in the display device of the prior art.

In the prior art, the film tape 300 ′ is a foam with stickiness, that is, compared with the film tape 300 of the present invention, the film tape 300 ′ only includes the first substrate 301 and the second adhesive that are connected to each other. 304.

As can be seen from FIGS. 16-17 and FIGS. 18A-18D , the film tape 300 ′ is generally in a band-like structure as a whole without a notch 340 , and a part of the film tape 300 ′ covers the protrusions 16313 .

As shown in FIG. 18A , when the diaphragm hanger is tilted under force, the diaphragm adhesive tape 300 ′ is foamed and has relatively high compressibility. Under the action of the force, as shown in FIG. 18B , the diaphragm adhesive tape 300 ′ When the thickness of the diaphragm tape 300' is reduced, the gap between the diaphragm tape 300' and the upper end of the protrusion 16313 becomes larger, so that, as shown in FIG. 18C, one end of the diaphragm hanging lug 152 becomes larger. It will slowly pass through the gap between the diaphragm tape 300' and the upper end of the protrusion 16313. As time goes by, as shown in FIG. 18D, the diaphragm mounting lug 152 with the diaphragm tape 300' falls off from the protrusion 16313, and finally cause the diaphragm to pop out.

Compared with the prior art, as shown in FIG. 19 , because the diaphragm tape 300 in the embodiment of the present invention has two layers of substrates, and the hardness of the second layer of substrates is relatively large, when the diaphragm hanger is stressed When tilted, compared with the existing diaphragm adhesive tape, because the diaphragm adhesive tape 300 has higher hardness, under the action of the force, the thickness of the diaphragm adhesive tape 300 is not thin enough to make one end of the diaphragm hanging lug pass through the diaphragm. The gap between the sheet tape 300 and the upper end of the protrusion 16313 will not cause the membrane to jump out.

It should be noted that the film tape 300 in the embodiment of the present invention is not only applicable to the direct type display device, but also to the side entry type display device. FIG. 20 shows the film tape 300 ″ in the side entry type display device. use case in .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A liquid crystal display device, characterized in that, comprising: a middle frame, the middle frame includes a diaphragm bearing part, and the diaphragm bearing part is provided with a protrusion; Optical film, the optical film includes an optical film body and a film hanging ear connected to the optical film body, the film hanging ear is placed on the film bearing part, and the film hanging ear is hooked on the protrusion; Film tape, the film tape is bonded on the middle frame and covers the film hanging ears of the optical film; wherein the film tape includes a first base material and a second base material in the thickness direction , the compressibility of the first substrate is greater than the compressibility of the second substrate. 2 . The liquid crystal display device according to claim 1 , wherein the film tape comprises a film tape body, and the film tape body is provided with a notch portion, and the notch portion is used to avoid the protrusion. 3 . . 3 . The liquid crystal display device according to claim 2 , wherein the film tape further comprises pointed parts connected to the film tape body and located at both ends. 4 . 4. The liquid crystal display device according to claim 1, wherein the film tape further comprises a first back glue located between the first base material and the second base material and an adhesive used for bonding Fix the second base material and the second adhesive of the middle frame. 5 . The liquid crystal display device according to claim 4 , wherein the adhesiveness of the second adhesive is greater than the adhesiveness of the first adhesive. 6 . 6 . The liquid crystal display device of claim 1 , wherein the second substrate is closer to the middle frame than the first substrate. 7 . 7 . The liquid crystal display device according to claim 1 , wherein the compression ratio of the first substrate is 40-60%. 8 . 8. The liquid crystal display device according to claim 1, wherein the hardness of the second substrate is 50-90 degrees. 9 . The liquid crystal display device of claim 1 , wherein the first substrate is foam, and the second substrate is a silicone sheet. 10 . 10 . The liquid crystal display device according to claim 1 , wherein the liquid crystal display device is a direct type display device or an edge-lit display device. 11 .