CN210199450U

CN210199450U - Backlight module and liquid crystal module

Info

Publication number: CN210199450U
Application number: CN201920779762.4U
Authority: CN
Inventors: Zheng Zhou; 周政
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-03-27
Anticipated expiration: 2029-05-27

Abstract

The utility model provides a backlight module and LCD module, this backlight module include backplate, light source, leaded light component, optics diaphragm and fixed frame, and the backplate includes bottom plate and lateral wall, the bottom plate with the lateral wall forms and holds the chamber, and light source, leaded light component, optics diaphragm set up hold the intracavity, at least one lateral wall is equipped with in the position that corresponds the optics diaphragm and keeps away a breach, keeps away highly being greater than or equal to of a breach the thickness of optics diaphragm. The utility model discloses a position breach is kept away in the position setting that the side corresponds the optics diaphragm, when the optics diaphragm is heated the inflation, the optics diaphragm after the deformation is located keeps away in the position breach, and the optics diaphragm can not be because of the obstructed fold that produces of inflation, has alleviated current backlight unit who is used for narrow frame vehicle-mounted display equipment and has had the obstructed technical problem of optics diaphragm inflation, has strengthened narrow frame vehicle-mounted display equipment's display stability, has improved user and has used experience.

Description

Backlight module and liquid crystal module

Technical Field

The utility model relates to a show technical field, especially relate to a backlight unit and liquid crystal module.

Background

As shown in fig. 1, in a backlight module 10 of a conventional vehicle-mounted display device, a sheet metal part such as an aluminum casting is generally used as a back plate 101, the back plate 101 includes a bottom plate 1011 and a side wall 1012, the bottom plate 1011 and the side wall 1012 form an accommodating cavity a, a light source 102, a light guide plate 103, an optical film layer 104 and the like are disposed in the accommodating cavity a, a fixing frame 105 is fixed on the back plate 101, and a gap s between the optical film 104 and the like and the side wall 1012 is small in order to realize a narrow frame of the vehicle-mounted display device.

Under the high temperature condition, the optical film piece can take place the inflation, because on-vehicle display device's optical film piece is whole great, and then because the deformation volume that the inflation produced is also great, when the deformation volume of optical film piece, is greater than the clearance between optical film piece and the lateral wall, the optical film piece can be because of the obstructed fold that leads to of inflation, and then arouses backlight unit's optics bad.

Therefore, the existing backlight module for the narrow-frame vehicle-mounted display equipment has the technical problem that the expansion of an optical film is blocked, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a backlight unit and LCD module to alleviate the obstructed technical problem of optics diaphragm inflation that current backlight unit that is used for narrow frame vehicle-mounted display equipment exists.

In order to solve the above problem, the utility model provides a technical scheme as follows:

an embodiment of the utility model provides a backlight module, it includes:

the back plate comprises a bottom plate and a side wall, and an accommodating cavity is defined by the bottom plate and the side wall;

a light source disposed within the receiving cavity;

the light guide member is arranged in the accommodating cavity, and the light emitting surface of the light source corresponds to the light incident surface of the light guide member;

the optical diaphragm is arranged in the accommodating cavity and is positioned on the light emergent surface of the light guide member;

the fixing frame is arranged on the side wall;

wherein, at least one lateral wall is equipped with keeps away a breach and is located keep away the support arch of a breach both sides, keep away the position that sets up of a breach with the position of optical diaphragm corresponds, the height that keeps away a breach is more than or equal to the thickness of optical diaphragm, fixed frame sets up support arch is last.

The embodiment of the utility model provides an among the backlight unit, keep away the width of a breach and be greater than the width of optics diaphragm.

The embodiment of the utility model provides an among the backlight unit, keep away the width of position breach and be less than the width of optics diaphragm, the optics diaphragm is corresponding support bellied region and be formed with the diaphragm breach, the width of optics diaphragm with the difference of the total width of diaphragm breach is less than keep away the width of position breach.

In the backlight module provided by the embodiment of the present invention, the light source is disposed between the light guide plate and the at least one side wall; alternatively, the light source is disposed between the light guide plate and the bottom plate.

The embodiment of the utility model provides an among the backlight unit, keep away the shape of a breach and be the recess.

The embodiment of the utility model provides an among the backlight unit, still include the reflector plate, the reflector plate sets up hold the intracavity, and be located the leaded light component with between the bottom plate.

The embodiment of the utility model provides an among the backlight unit, fixed frame is including gluing at least one of frame, cast aluminium spare or panel beating frame.

The embodiment of the utility model provides an among the backlight unit, the bottom surface of fixed frame is equipped with fixed breach, fixed frame passes through fixed breach reaches it is protruding to support, fix on the lateral wall.

The embodiment of the present invention provides a backlight module, wherein the cross-sectional shape of the fixing notch is at least one of rectangular, trapezoidal or semicircular.

The embodiment of the utility model provides an among the backlight unit, support bellied height, be greater than or be equal to the degree of depth of fixed breach.

The embodiment of the utility model provides a liquid crystal module, it includes:

the backlight module comprises a back plate, a light source, a light guide plate, an optical diaphragm and a fixing frame, wherein the back plate comprises a bottom plate and a side wall, the bottom plate and the side wall form a containing cavity, the light source, the light guide plate and the optical diaphragm are arranged in the containing cavity, a light emergent surface of the light source corresponds to a light incident surface of the light guide plate, the optical diaphragm is positioned on the light emergent surface of the light guide plate, and the fixing frame is arranged on the back plate;

the liquid crystal display panel is fixed on the fixing frame;

The embodiment of the utility model provides an among the liquid crystal module, liquid crystal module still includes touch panel, touch panel fixes on the fixed frame.

The utility model has the advantages that: the utility model provides a backlight module and a liquid crystal module, the backlight module comprises a back plate, a light source, a light guide component, an optical diaphragm and a fixing frame, the back plate comprises a bottom plate and a side wall, the bottom plate and the side wall form a containing cavity, the light source is arranged in the containing cavity, the light guide component is arranged in the containing cavity, a light-emitting surface of the light source corresponds to a light-in surface of the light guide component, the optical diaphragm is arranged in the containing cavity and is positioned on the light-emitting surface of the light guide component; the fixing frame is arranged on the back plate, at least one side wall is provided with a avoiding gap at a position corresponding to the optical diaphragm, and the height of the avoiding gap is larger than or equal to the thickness of the optical diaphragm. The embodiment of the utility model provides a position breach is kept away through the position setting that corresponds the optics diaphragm at the side, when the optics diaphragm is heated the inflation, optics diaphragm after the deformation is located keeps away in the position breach, the lateral wall can not obstruct the inflation of optics diaphragm like this, and then the optics diaphragm can not be because of the inflation production fold that is obstructed, it has the obstructed technical problem of optics diaphragm inflation to have alleviated current backlight unit who is used for narrow frame vehicle-mounted display equipment, narrow frame vehicle-mounted display equipment's display stability has been strengthened, user experience of using has been improved.

Drawings

In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a conventional backlight module;

fig. 2 is a schematic view of a first structure of a backlight module according to an embodiment of the present invention;

FIG. 3 is a first cross-sectional view of section A-A' of FIG. 2;

FIG. 4 is a second cross-sectional view of section A-A' of FIG. 2;

FIG. 5 is a third schematic cross-sectional view of section A-A' of FIG. 2;

FIG. 6 is a first cross-sectional view of section B-B' of FIG. 2;

FIG. 7 is a second cross-sectional view of section B-B' of FIG. 2;

fig. 8 is a schematic view of a second structure of a backlight module according to an embodiment of the present invention;

fig. 9 is a schematic view of a first structure of a liquid crystal module according to an embodiment of the present invention;

fig. 10 is a schematic view of a second structure of a liquid crystal module according to an embodiment of the present invention.

Detailed Description

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side wall ], refer to the directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.

In the drawings of the present invention, X represents the length direction of the module, Y represents the width direction of the module, and Z represents the height direction of the module.

To the obstructed technical problem of optics diaphragm inflation that present backlight unit that is used for narrow frame vehicle-mounted display equipment exists, the embodiment of the utility model provides a can alleviate.

In an embodiment, as shown in fig. 2 to 8, a backlight module 20 provided in an embodiment of the present invention includes:

the back plate 201 comprises a bottom plate 2011 and a side wall 2012, wherein the bottom plate 2011 and the side wall 2012 enclose a containing cavity b;

a light source 202 disposed in the accommodating chamber b;

the light guide member 203 is arranged in the accommodating cavity b, and the light emitting surface of the light source 202 corresponds to the light incident surface of the light guide member 203;

an optical film 204 disposed in the accommodating cavity b and located on the light-emitting surface of the light guide member 203;

a fixing frame 205 provided on the sidewall 2012;

at least one side wall 2012 is provided with a clearance c and a support protrusion 2013 located on two sides of the clearance c, the setting position of the clearance c corresponds to the position of the optical film 204, the height H of the clearance c is greater than or equal to the thickness d of the optical film 204, and the fixing frame 205 is arranged on the support protrusion 2013.

In this embodiment, the optical film 204 expands in the X direction under high temperature, and based on the avoiding gap c, the sidewall 2012 does not block the optical film 204, and the optical film 204 can extend into the avoiding gap c, so that no wrinkle is generated, and poor optics is avoided.

The embodiment provides a backlight module, which comprises a back plate, a light source, a light guide member, an optical membrane and a fixing frame, wherein the back plate comprises a bottom plate and a side wall, the bottom plate and the side wall form an accommodating cavity, the light source is arranged in the accommodating cavity, the light guide member is arranged in the accommodating cavity, a light emergent surface of the light source corresponds to a light incident surface of the light guide member, and the optical membrane is arranged in the accommodating cavity and is positioned on the light emergent surface of the light guide member; the fixing frame is arranged on the back plate, a position avoiding notch is formed in the position, corresponding to the optical diaphragm, of at least one side wall, and the height of the position avoiding notch is larger than or equal to the thickness of the optical diaphragm; the side wall is provided with the avoiding gap. This embodiment keeps away a breach through the position setting that corresponds optical diaphragm at the side, and when optical diaphragm was heated the inflation, the optical diaphragm after the deformation was located keeps away in the breach, and the lateral wall can not hinder optical diaphragm's inflation like this, and then optical diaphragm can not be because of the inflation is obstructed and produce the fold, has improved user and has used experience.

In one embodiment, the back plate 201 is generally made of iron frame, sheet metal, cast aluminum, etc. to ensure strength and good heat dissipation performance.

In the embodiment shown in fig. 2, the backlight module 20 is a side-in type backlight module, the light source 202 is disposed between the light guide member 203 and at least one sidewall 2012, the light source 202 is disposed between the light guide member 203 and one sidewall 2012, and the light source 202 may be disposed between the light guide member 203 and several sidewalls 2012, as shown in fig. 2, the light source 202 includes a light bar 2021 and an LED lamp 2022 fixed on the light bar 2021, and the light bar 2021 is fixed on the sidewall 2012 a.

In the embodiment shown in fig. 2, since the backlight module 20 is a side-in type backlight module and the light guide member 203 is a light guide plate, the light guide plate converts the side-in type horizontal incident light emitted from the light source 202 into a vertical emergent light, and the vertical emergent light is emitted through the light emitting surface of the light guide member 203. The light guide plate is generally made of optical-grade resin materials, and commonly used are thermoplastic resin, polycarbonate, acrylic and the like.

In one embodiment, as shown in fig. 2, the backlight module 20 is further provided with a reflective sheet 206 under the light guide member 203, the reflective sheet 206 is disposed on a bottom plate 2011 of the back plate 201, the light guide member 203 is disposed on the reflective sheet 206, and the material constituting the reflective sheet 206 is generally a PET (polyethylene terephthalate) film with a high-reflectivity metal film plated on the surface, or a combination of an upper PET (polyethylene terephthalate) film and a lower PET (polyethylene terephthalate) film with a core layer (polymer resin with high reflectivity). The main function of the reflective sheet 206 is to reflect light leaked from the light guide member 203 back to improve the utilization of the light source.

The optical film 204 includes a diffusion sheet 2041, a prism sheet 2042, and a reflection-type polarization enhancement film 2043, which are stacked. The diffusion sheet 2041 is generally made of a PET (polyethylene terephthalate) or PC (polycarbonate) substrate, and has a smooth front surface and a rough back surface, and the diffusion sheet 2041 has a function of refracting, reflecting, and scattering light emitted through the light emitting surface of the light guide member 203 for multiple times, so that the backlight is more uniform. The prism sheet 2042 is a light condensing means, and concentrates the dispersed light to exit within a certain angle range by using the law of total reflection and refraction to improve the brightness within the exit range. The reflective polarizing brightness enhancement film 2043 may also enhance the brightness of the backlight.

In one embodiment, the fixing frame 205 includes at least one of a rubber frame, an aluminum casting or a metal plate frame, the rubber frame is formed of polycarbonate or polycarbonate doped with glass fiber, the aluminum casting is formed of aluminum alloy, and the metal plate frame is formed of metal plate to ensure support strength.

In one embodiment, as shown in fig. 6, the fixing frame 205 comprises a bottom surface 2051, the bottom surface 2051 being provided on said support protrusions 2013.

In one embodiment, as shown in fig. 3, the back plate 201 includes a sidewall 2012a, a sidewall 2012b, a sidewall 2012c and a sidewall 2012d, the sidewall 2012a and the sidewall 2012b are disposed oppositely, and the sidewall 2012c and the sidewall 2012d are disposed oppositely.

As shown in fig. 2 and 3, the light source 202 is fixed on the sidewall 2012a, and the clearance gap c is disposed on the sidewall 2012 b.

In one embodiment, the clearance gap c is formed on two opposite sidewalls, such as sidewall 2012c and sidewall 2012 d. When the optical film 204 expands toward the sidewall 2012c and the sidewall 2012d due to heating, neither of the two sidewalls will block the optical film based on the avoiding gap c, and the optical film 204 can extend toward the two sidewalls without generating wrinkles, thereby avoiding causing poor optics.

In one embodiment, the clearance gap c is formed between two adjacent sidewalls, such as the sidewall 2012c and the sidewall 2012 b. When the optical film 204 expands toward the sidewall 2012c and the sidewall 2012b due to heating, neither of the two sidewalls will block the optical film based on the avoiding gap c, and the optical film 204 can extend toward the two sidewalls without generating wrinkles, thereby avoiding causing poor optics.

In one embodiment, clearance gaps c are provided in three sidewalls, such as sidewall 2012b, sidewall 2012c and sidewall 2012 d. When the optical film 204 is heated and expands toward the sidewall 2012b, the sidewall 2012c and the sidewall 2012d, the three sidewalls do not block the optical film based on the avoiding gap c, and the optical film 204 can extend toward the sidewalls without generating wrinkles, thereby avoiding causing poor optics.

In one embodiment, the clearance gap c is formed on all the sidewalls, such as the sidewall 2012a, the sidewall 2012b, the sidewall 2012c and the sidewall 2012 d. When the optical film 204 is heated and expands around, the sidewall will not block the optical film based on the avoiding gap c, and the optical film 204 can extend towards the sidewall without generating wrinkles, thereby avoiding causing optical defects.

In an embodiment, the light source 202 may also be disposed between two or more sidewalls 2012 of the light guide member 203, and the sidewall where the light source 202 is not disposed and the sidewall where the light source 202 is disposed may be optionally provided with a space-avoiding notch c according to requirements, and the space-avoiding notches c may be formed on all sidewalls, or may be formed on part of the sidewalls.

In one embodiment, as shown in fig. 3, the width Lc of the clearance gap c is greater than the width Lm of the optical film 204, so that when the optical film 204 expands into the clearance gap c, it can be ensured that the optical film 204 can smoothly expand into the clearance gap c without colliding with the sidewall 2012.

In one embodiment, as shown in (1) of fig. 4, the width Lc of the clearance gap c is smaller than the width Lm of the optical film 204, and at this time, in order to avoid the optical film 204 from being blocked by expansion, as shown in (2) of fig. 4, the optical film 204 is formed with a film gap 2041 in the area corresponding to the supporting protrusion 2013, and the difference Lm' between the width Lm of the optical film and the total width (LQ 1+ LQ2) of the film gap 2041 is smaller than the width Lc of the clearance gap. Thus, when the optical film 204 expands, since the optical film 204 is formed with the film gap 2041 corresponding to the supporting protrusion 2013, the supporting protrusions 2013 on the two sides of the avoiding gap c do not hinder the expansion of the optical film 204, so that it can be ensured that a section of the optical film having the film gap 2041 in the optical film 204 can smoothly expand into the avoiding gap c, and does not collide with the side wall 2012, and further the optical film 204 does not wrinkle due to the blocked expansion.

In one embodiment, to avoid the notch 2041 of the optical film 204 from affecting the backlight quality, the projection of the notch 2041 on the bottom plate 2011 is covered by the projection of the fixing frame 205 on the bottom plate 2011.

In an embodiment, as shown in fig. 5 (1), based on the embodiment shown in fig. 2, in order to enhance the fixing stability of the fixing frame 205 and the side wall 2013, the side wall 2013 further includes an auxiliary supporting protrusion 2014 disposed in the clearance gap c, at this time, the auxiliary supporting protrusion 2014 divides the clearance gap c into two or more sub clearance gaps, that is, the sub clearance gap c 1 and the sub clearance gap c2 shown in fig. 5 (1), and in order to avoid the obstruction of the auxiliary supporting protrusion 2014 on the optical diaphragm 204, as shown in fig. 5 (2), the optical diaphragm 204 needs to be cut in the corresponding region of the auxiliary supporting protrusion 2014 to form an auxiliary diaphragm gap 2042 in the corresponding region, at this time, the width LQ3 of the diaphragm gap 2042 is greater than the width Lf of the auxiliary supporting protrusion 2014. Thus, when the optical film 204 expands, since the optical film 204 is formed with the auxiliary film notch 2042 corresponding to the auxiliary supporting protrusion 2014, the expansion of the optical film 204 is not hindered by the auxiliary supporting protrusion 2014 in the avoiding notch c, so that it can be ensured that a section of the optical film provided with the auxiliary film notch 2042 in the optical film 204 can smoothly expand in the avoiding notch c, and cannot collide with the auxiliary supporting protrusion 2014 on the sidewall 2012, and further the optical film 204 cannot be wrinkled due to the blocked expansion.

In one embodiment, as shown in fig. 6 or 7, the clearance gap c is a groove, and the groove may be at least one of a right-angle rectangle lacking one side, a rounded rectangle, a semicircle, a trapezoid, a triangle, and the like. The shape of the clearance c is not limited to this, and may be other shapes as long as the optical film 204 does not contact the sidewall 2012 during expansion, and the shape may be designed as required.

In an embodiment, as shown in fig. 6, the bottom surface 2051 of the fixing frame 205 is a plane, and the fixing frame 205 is directly fixed on the supporting protrusions 2013.

In an embodiment, as shown in fig. 7, a bottom surface 2051 of the fixing frame 205 is provided with a fixing notch 2052, and the fixing frame 205 is fixed on the sidewall 2012 by the fixing notch 2052 and the supporting protrusion 2013.

In one embodiment, the securing notch 2052 has a cross-sectional shape that is at least one of rectangular, trapezoidal, or semi-circular.

In one embodiment, the support protrusions 2013 are shaped the same as the securing notches 2052, and both may have a cross-sectional shape that is at least one of rectangular, trapezoidal, semi-circular, or other shape.

In one embodiment, the support projections 2013 are shaped differently than the securing notches 2052, such as the support projections 2013 being rectangular, the securing notches 2052 being semi-circular, etc. The shape of the supporting protrusions 2013 and the shape of the fixing notches 2052 may be designed as desired.

In one embodiment, as shown in fig. 7, the height h 1 of the support protrusions 2013 is greater than or equal to the depth h2 of the securing notch 2052. This ensures that the support protrusions 2013 can fully extend into the fixing notches 2052, supporting the fixing frame 205 and the backlight space in the vertical direction Z.

In one embodiment, as shown in fig. 7, the difference H1-H2 between the height H1 of the supporting protrusion 2013 and the depth H2 of the fixing notch 2052 is equal to the height H of the avoiding notch c, so that the fixing frame 205 is stably disposed on the sidewall 2012.

The avoiding notch c and the supporting protrusion 2013 are formed in various ways.

In one embodiment, all the sidewalls 2012 are formed, and then a portion of the sidewall 2012b is cut downward along the vertical direction Z to form the clearance gap c in the middle area of the sidewall 2012b, and the rest of the uncut portion serves as the supporting protrusion 2013. It is also possible to directly form the sidewall 2012 including the clearance gap c and the support protrusions 2013.

In one embodiment, as shown in FIG. 8, the backlight module 20 is a direct-type backlight module. The light source 202 is disposed between the light guide member 203 and the bottom plate of the bottom plate 2011, the reflector 206 is further disposed between the light source 203 and the bottom plate 2011, the light source 202 emits light from bottom to top, and the light incident surface of the light guide member 203 corresponds to the light emitting surface of the light source 202.

In this embodiment, the light guide member 203 is a diffuser plate, which sufficiently scatters the incident light emitted from the light source 202, and has a good shielding effect on the lamp shadow, so as to achieve a softer and more uniform light source.

In one embodiment, as shown in fig. 8, the sidewall 2012a and the sidewall 2012b are formed with an avoiding gap c, and when the optical film 204 expands due to heat, the sidewall 2012 does not block the optical film 204 due to the avoiding gap c, so that no wrinkle is generated and the optical defect is avoided. Of course, the relief notch c may be formed in only one sidewall 2012, or may be formed in any two or more sidewalls 2012.

In an embodiment, the utility model provides an in still provide a liquid crystal module, it includes the utility model provides a backlight unit to and liquid crystal display panel, liquid crystal display panel fix on backlight unit's fixed frame.

In an embodiment, when the liquid crystal module does not support the touch function, or the liquid crystal display panel is integrated with a touch function layer, as shown in fig. 9, the embodiment of the present invention provides a liquid crystal module 40 including:

a backlight module 20 including a back plate 201, a light source 202, a light guide member 203, an optical film 204, and a fixing frame 205; the back plate 201 comprises a bottom plate 2011 and a side wall 2012, the bottom plate 2011 and the side wall 2012 enclose a containing cavity b, the light source 202, the light guide member 203 and the optical diaphragm 204 are arranged in the containing cavity b, a light emergent surface of the light source 202 corresponds to a light incident surface of the light guide member 203, the optical diaphragm 204 is positioned on the light emergent surface of the light guide member 203, and the fixing frame 205 is arranged on the back plate 201;

a liquid crystal display panel 31 fixed to the fixing frame 205;

The embodiment provides a liquid crystal module, wherein at least one side wall of a backlight module is provided with a position avoiding notch at a position corresponding to an optical diaphragm, and the height of the position avoiding notch is greater than or equal to the thickness of the optical diaphragm; be provided with on the lateral wall of keeping away a breach, still be provided with and be located keep away the support arch of a breach both sides, fixed frame sets up support arch is last. This embodiment is through setting up in the position that corresponds optical diaphragm at the side and keeping away a breach, when optical diaphragm is heated the inflation, optical diaphragm after the deformation is located keeps away in the breach, and the lateral wall can not hinder optical diaphragm's inflation like this, and then optical diaphragm can not be because of the inflation is obstructed and produces the fold.

The liquid crystal display panel 31 is fixed on the fixing frame 205 of the backlight module by an adhesive layer 32, and the material of the adhesive layer 32 is usually double-sided tape or foam.

In an embodiment, when the liquid crystal module supports the touch function and there is no integrated touch function layer in the liquid crystal display panel, as shown in fig. 10, the embodiment of the present invention provides a liquid crystal module 40 further including: and the touch panel 33, wherein the touch panel 33 is fixed on the fixing frame 205.

In the present embodiment, the top surface 2053 of the fixing frame 205 has a step-shaped cross section, the liquid crystal display panel 31 and the touch panel 33 are respectively fixed on different steps of the fixing frame 205 of the backlight module by the adhesive layer 32, the material of the adhesive layer 32 is usually double-sided tape or foam, and an adhesive material (not shown) is also disposed between the liquid crystal display panel 31 and the touch panel 33, and the adhesive material is usually transparent optical adhesive or the like.

In an embodiment, in the liquid crystal module provided in the present invention, the width of the avoiding gap is greater than the width of the optical film.

In an embodiment, in the liquid crystal module provided in the present invention, the width of the avoiding gap is smaller than the width of the optical film, the optical film is corresponding to the supporting protrusion region is formed with a film gap, the difference between the width of the optical film and the total width of the film gap is smaller than the width of the avoiding gap.

In an embodiment, in the liquid crystal module provided in the embodiments of the present invention, the light source is disposed between the light guide plate and at least one side wall; alternatively, the light source is disposed between the light guide plate and the bottom plate.

In an embodiment of the invention, in the liquid crystal module provided in the embodiment of the invention, the shape of the avoiding gap is a groove.

In an embodiment, in the liquid crystal module provided in the present invention, the backlight module 20 further includes a reflective sheet 206, the reflective sheet is disposed in the accommodating cavity and located between the light guide member and the bottom plate.

In an embodiment, in the liquid crystal module provided by the utility model, the bottom surface of fixed frame is equipped with fixed breach, fixed frame passes through fixed breach reaches the support protrusion is fixed on the lateral wall.

In an embodiment, in the liquid crystal module provided in the present invention, a cross-sectional shape of the fixing notch is at least one of a rectangle, a trapezoid, or a semicircle.

In an embodiment, in the liquid crystal module provided by the present invention, the height of the supporting protrusion is greater than or equal to the depth of the fixing notch.

And simultaneously, the utility model provides a narrow frame vehicle-mounted display equipment is still provided, this narrow frame vehicle-mounted display equipment includes the utility model provides a liquid crystal module.

The embodiment provides a narrow-frame vehicle-mounted display device, wherein a position-avoiding notch is arranged on at least one side wall of a backlight module of a liquid crystal module at a position corresponding to an optical diaphragm. This embodiment keeps away a breach through the position setting that corresponds optical diaphragm at the side, when optical diaphragm is heated the inflation, optical diaphragm after the deformation is located keeps away in the breach, the lateral wall can not obstruct the inflation of optical diaphragm like this, and then optical diaphragm can not be because of the inflation is obstructed produces the fold, it has the obstructed technical problem of optical diaphragm inflation to have alleviated current backlight unit who is used for narrow frame vehicle mounted display equipment, narrow frame vehicle mounted display equipment's display stability has been strengthened, user experience has been improved.

According to the above embodiments:

the utility model provides a backlight module and a liquid crystal module, the backlight module comprises a back plate, a light source, a light guide component, an optical diaphragm and a fixing frame, the back plate comprises a bottom plate and a side wall, the bottom plate and the side wall form a containing cavity, the light source is arranged in the containing cavity, the light guide component is arranged in the containing cavity, a light-emitting surface of the light source corresponds to a light-in surface of the light guide component, the optical diaphragm is arranged in the containing cavity and is positioned on the light-emitting surface of the light guide component; the fixing frame is arranged on the back plate, at least one side wall is provided with a avoiding gap at a position corresponding to the optical diaphragm, and the height of the avoiding gap is larger than or equal to the thickness of the optical diaphragm. The utility model discloses a position breach is kept away in the position setting that the side corresponds the optics diaphragm, when the optics diaphragm is heated the inflation, optics diaphragm after the deformation is located keeps away in the position breach, and the lateral wall can not obstruct the inflation of optics diaphragm like this, and then the optics diaphragm can not be because of the inflation production fold that is obstructed, has alleviated current backlight unit who is used for narrow frame vehicle-mounted display equipment and has had the obstructed technical problem of optics diaphragm inflation, has strengthened narrow frame vehicle-mounted display equipment's display stability, has improved user experience.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.

Claims

1. A backlight module, comprising:

a light source disposed within the receiving cavity;

the fixing frame is arranged on the side wall;

2. The backlight module as claimed in claim 1, wherein the width of the avoiding gap is larger than the width of the optical film.

3. The backlight module as claimed in claim 1, wherein the avoiding gap has a width smaller than that of the optical film, the optical film has a film gap formed in a region corresponding to the supporting protrusion, and a difference between the width of the optical film and the total width of the film gaps is smaller than that of the avoiding gap.

4. The backlight module according to claim 1, wherein the light source is disposed between the light guide member and at least one sidewall; alternatively, the light source is disposed between the light guide member and the bottom plate.

5. The backlight module as claimed in claim 1, wherein the avoiding gap is shaped as a groove.

6. The backlight module according to claim 1, further comprising a reflective sheet disposed in the receiving cavity between the light guide member and the chassis base.

7. The backlight module according to claim 1, wherein the fixing frame comprises at least one of a rubber frame, an aluminum casting or a sheet metal frame.

8. The backlight module according to any one of claims 1 to 7, wherein the bottom surface of the fixing frame is provided with a fixing notch, and the fixing frame is fixed on the side wall through the fixing notch and the supporting protrusion.

9. The backlight module as claimed in claim 8, wherein the fixing notch has a cross-sectional shape of at least one of a rectangle, a trapezoid or a semicircle.

10. The backlight module as claimed in claim 8, wherein the height of the supporting protrusion is greater than or equal to the depth of the fixing notch.

11. A liquid crystal module, comprising:

the liquid crystal display panel is fixed on the fixing frame;

12. The liquid crystal module as claimed in claim 11, further comprising a touch panel fixed to the fixing frame.