WO2020237934A1 - 背光模组和液晶模组 - Google Patents

背光模组和液晶模组 Download PDF

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Publication number
WO2020237934A1
WO2020237934A1 PCT/CN2019/107312 CN2019107312W WO2020237934A1 WO 2020237934 A1 WO2020237934 A1 WO 2020237934A1 CN 2019107312 W CN2019107312 W CN 2019107312W WO 2020237934 A1 WO2020237934 A1 WO 2020237934A1
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WO
WIPO (PCT)
Prior art keywords
optical film
notch
liquid crystal
light guide
width
Prior art date
Application number
PCT/CN2019/107312
Other languages
English (en)
French (fr)
Inventor
周政
Original Assignee
武汉华星光电技术有限公司
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
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/631,173 priority Critical patent/US20200379289A1/en
Publication of WO2020237934A1 publication Critical patent/WO2020237934A1/zh

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Classifications

    • 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

Definitions

  • This application relates to the field of display technology, in particular to a backlight module and a liquid crystal module.
  • the back plate 101 includes a bottom plate 1011 and side walls 1012, and a bottom plate 1011 and side walls.
  • the wall 1012 forms a accommodating cavity a, the light source 102, the light guide plate 103, the optical film layer 104, etc. are arranged in the accommodating cavity a, and the fixed frame 105 is fixed on the back plate 101.
  • the optical film 104, etc. The gap s with the side wall 1012 is small.
  • the optical film Under high temperature conditions, the optical film will expand. Because the optical film of the vehicle-mounted display device is relatively large, the deformation caused by the expansion is also large. The deformation of the optical film is larger than that of the optical film and the side. When there is a gap between the walls, the optical film will be blocked due to expansion and cause wrinkles, thereby causing optical defects of the backlight module.
  • the existing backlight module for narrow-frame vehicle-mounted display devices has a technical problem that the expansion of the optical film is hindered, and needs to be improved.
  • the present application provides a backlight module and a liquid crystal module to alleviate the technical problem that the existing backlight module used for narrow-frame vehicle-mounted display devices is blocked from expansion of the optical film.
  • An embodiment of the present application provides a backlight module, which includes:
  • the backplane includes a bottom plate and side walls, and the bottom plate and the side walls enclose a receiving cavity;
  • the light source is arranged in the containing cavity
  • the light guide member is arranged in the containing cavity, and the light exit surface of the light source corresponds to the light entrance surface of the light guide member;
  • the optical film is arranged in the accommodating cavity and is located on the light emitting surface of the light guide member;
  • the fixed frame is arranged on the side wall;
  • At least one side wall is provided with a avoidance notch and support protrusions located on both sides of the avoidance notch.
  • the position of the avoidance notch corresponds to the position of the optical film.
  • the height is greater than or equal to the thickness of the optical film, and the fixing frame is arranged on the supporting protrusion.
  • the width of the avoiding gap is greater than the width of the optical film.
  • the width of the avoidance notch is smaller than the width of the optical film
  • the optical film is formed with a film notch in an area corresponding to the support protrusion, and The difference between the width of the optical film and the total width of the film notch is smaller than the width of the avoidance notch.
  • the light source is arranged between the light guide plate and at least one side wall; or, the light source is arranged between the light guide plate and the bottom plate.
  • the shape of the avoiding gap is a groove.
  • the backlight module provided by the embodiment of the present application, it further includes a reflective sheet, and the reflective sheet is disposed in the containing cavity and located between the light guide member and the bottom plate.
  • the fixed frame includes at least one of a plastic frame, a cast aluminum part, or a sheet metal frame.
  • 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.
  • the cross-sectional shape of the fixing notch is at least one of a rectangle, a trapezoid, or a semicircle.
  • the height of the supporting protrusion is greater than or equal to the depth of the fixing notch.
  • An embodiment of the application provides a liquid crystal module, which includes:
  • the backlight module includes a back plate, a light source, a light guide plate, an optical film, and a fixing frame.
  • the back plate includes a bottom plate and side walls. The bottom plate and the side walls form an accommodating cavity.
  • the light source, light guide plate, and optical The diaphragm is arranged in the containing cavity, the light exit surface of the light source corresponds to the light entrance surface of the light guide plate, the optical diaphragm is located on the light exit surface of the light guide plate, and the fixed frame is arranged on the back plate;
  • the liquid crystal display panel is fixed on the fixed frame
  • At least one side wall is provided with a avoidance notch and support protrusions located on both sides of the avoidance notch.
  • the position of the avoidance notch corresponds to the position of the optical film.
  • the height is greater than or equal to the thickness of the optical film, and the fixing frame is arranged on the supporting protrusion.
  • the liquid crystal module further includes a touch panel, and the touch panel is fixed on the fixed frame.
  • the width of the avoidance gap is greater than the width of the optical film; or, the width of the avoidance gap is smaller than the width of the optical film, and the optical film A film notch is formed in the region corresponding to the support protrusion, and the difference between the width of the optical film and the total width of the film notch is smaller than the width of the avoidance notch.
  • the light source is arranged between the light guide plate and at least one side wall; or, the light source is arranged between the light guide plate and the bottom plate.
  • the shape of the position avoidance gap is a groove.
  • the liquid crystal module provided in the embodiment of the present application further includes a reflective sheet, the reflective sheet is disposed in the containing cavity and located between the light guide member and the bottom plate.
  • the fixed frame includes at least one of a plastic frame, a cast aluminum part, or a sheet metal frame.
  • 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.
  • the cross-sectional shape of the fixing notch is at least one of a rectangle, a trapezoid, or a semicircle.
  • the height of the supporting protrusion is greater than or equal to the depth of the fixing notch.
  • the present application provides a backlight module and a liquid crystal module.
  • the backlight module includes a back plate, a light source, a light guide member, an optical film, and a fixing frame.
  • the back plate includes a bottom plate and side walls.
  • the side wall forms a accommodating cavity, the light source is arranged in the accommodating cavity, the light guide member is arranged in the accommodating cavity, the light exit surface of the light source corresponds to the light entrance surface of the light guide member, the
  • the optical film is arranged in the accommodating cavity and is located on the light emitting surface of the light guide member; the fixing frame is arranged on the back plate, and at least one side wall is provided at a position corresponding to the optical film
  • the avoidance gap, the height of the avoidance gap is greater than or equal to the thickness of the optical film.
  • a gap is provided at the position of the sidewall corresponding to the optical film.
  • FIG. 1 is a schematic diagram of the structure of an existing backlight module
  • FIG. 2 is a schematic diagram of the first structure of a backlight module provided by an embodiment of the application
  • Fig. 3 is a first schematic cross-sectional view of section A-A' in Fig. 2;
  • Fig. 4 is a second schematic cross-sectional view of the section A-A' in Fig. 2;
  • Fig. 5 is a third schematic cross-sectional view of the section A-A' in Fig. 2;
  • Fig. 6 is a first schematic cross-sectional view of section B-B' in Fig. 2;
  • Fig. 7 is a second schematic cross-sectional view of the section B-B' in Fig. 2;
  • FIG. 8 is a schematic diagram of a second structure of a backlight module provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of the first structure of a liquid crystal module provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of a second structure of a liquid crystal module provided by an embodiment of the application.
  • X represents the length direction of the module
  • Y represents the width direction of the module
  • Z represents the height direction of the module.
  • the embodiment of the present application can alleviate the technical problem that the expansion of the optical film is hindered in the existing backlight module used in the narrow-frame vehicle-mounted display device.
  • the backlight module 20 provided by the embodiment of the present application includes:
  • the back plate 201 includes a bottom plate 2011 and side walls 2012, and the bottom plate 2011 and the side walls 2012 enclose a receiving cavity b;
  • the light source 202 is arranged in the containing cavity b;
  • the light guide member 203 is arranged in the receiving cavity b, and the light exit surface of the light source 202 corresponds to the light entrance surface of the light guide member 203;
  • the optical film 204 is arranged in the containing cavity b and located on the light emitting surface of the light guide member 203;
  • the fixed frame 205 is arranged on the side wall 2012;
  • At least one side wall 2012 is provided with a avoidance notch c and support protrusions 2013 located on both sides of the avoidance notch.
  • the position of the avoidance notch c corresponds to the position of the optical film 204, and the avoidance notch
  • the height H of c is greater than or equal to the thickness d of the optical film 204, and the fixing frame 205 is disposed on the supporting protrusion 2013.
  • the optical film 204 expands in the X direction under high temperature conditions. Based on the avoidance gap c, the sidewall 2012 will not block the optical film 204, and the optical film 204 can extend into the avoidance gap c. In this way, wrinkles will not be generated and optical defects will be avoided.
  • the backlight module includes a back plate, a light source, a light guide member, an optical film, and a fixing frame.
  • the back plate includes a bottom plate and a side wall. The bottom plate and the side wall A accommodating cavity is formed, the light source is arranged in the accommodating cavity, the light guide member is arranged in the accommodating cavity, the light exit surface of the light source corresponds to the light entrance surface of the light guide member, and the optical film
  • the sheet is arranged in the accommodating cavity and is located on the light-emitting surface of the light guide member; the fixed frame is arranged on the back plate, and at least one side wall is provided with a position corresponding to the optical diaphragm A gap, the height of the avoidance gap is greater than or equal to the thickness of the optical film; on the side wall provided with the avoidance gap.
  • the sidewall is provided with a gap at the position corresponding to the optical film.
  • the deformed optical film is located in the gap, so that the sidewall will not hinder the expansion of the optical film. Furthermore, the optical film will not be wrinkled due to the hindered expansion, which improves the user experience.
  • the back plate 201 usually adopts an iron frame, sheet metal parts, cast aluminum parts, etc., to ensure strength and better heat dissipation performance.
  • the backlight module 20 is an edge-type backlight module
  • the light source 202 is disposed between the light guide member 203 and at least one side wall 2012, usually only between the light guide member 203 and one side wall 2012.
  • a light source 202 is provided between the light guide member 203 and the side walls 2012.
  • the light source 202 includes a light bar 2021 and an LED lamp 2022 fixed on the light bar 2021.
  • the strip 2021 is fixed on the side wall 2012a.
  • the light guide member 203 is a light guide plate
  • the light guide plate converts the side-lit horizontal incident light emitted by the light source 202 into vertical emission light, and It exits through the light exit surface of the light guide member 203.
  • the light guide plate is generally composed of optical-grade resin materials, commonly used thermoplastic resin, polycarbonate, and acrylic.
  • the backlight module 20 is further provided with a reflective sheet 206 under the light guide member 203, the reflective sheet 206 is provided on the bottom plate 2011 of the back plate 201, and the light guide member 203 is provided on the reflective
  • the material of the reflective sheet 206 is usually a PET (polyethylene terephthalate) film coated with a high-reflectivity metal film, or a core layer (polymer resin with high reflectivity) The upper and lower two layers of PET (polyethylene terephthalate) film assembly.
  • the main function of the reflective sheet 206 is to reflect the light carrier 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 reflective polarizing brightness enhancement film 2043 that are stacked.
  • the diffusion sheet 2041 generally adopts PET (polyethylene terephthalate) or PC (polycarbonate) base material, with a smooth front surface and a rough back surface.
  • the function of the diffusion sheet 2041 is to carry out the light emitted through the light emitting surface of the light guide member 203. Multiple refraction, reflection and scattering make the backlight more uniform.
  • the prism sheet 2042 is a light condensing device, which uses the laws of total reflection and refraction to concentrate the scattered light in a certain angle range and emit it to increase the brightness in the output range.
  • the reflective polarizing brightness enhancement film 2043 can also improve the brightness of the backlight.
  • the fixed frame 205 includes at least one of a plastic frame, a cast aluminum part or a sheet metal frame.
  • the plastic frame is formed of polycarbonate or polycarbonate mixed with glass fiber, and the cast aluminum part is made of aluminum alloy.
  • the sheet metal frame is formed of sheet metal to ensure the support strength.
  • the fixed frame 205 includes a bottom surface 2051, and the bottom surface 2051 is disposed on the supporting protrusion 2013.
  • the back plate 201 includes a side wall 2012a, a side wall 2012b, a side wall 2012c, and a side wall 2012d.
  • the side wall 2012a and the side wall 2012b are arranged oppositely, and the side wall 2012c and the side wall The walls 2012d are arranged relatively.
  • the light source 202 is fixed on the side wall 2012a, and the avoiding notch c is provided on the side wall 2012b.
  • two opposite side walls such as the side wall 2012c and the side wall 2012d, are provided with a position avoiding notch c.
  • the optical film 204 is heated to expand toward the sidewall 2012c and the sidewall 2012d, the two sidewalls will not block the optical film due to the avoidance gap c, and the optical film 204 can extend to the two sidewalls without causing Wrinkles to avoid causing optical defects.
  • two adjacent side walls such as the side wall 2012c and the side wall 2012b, are provided with position avoidance notches c.
  • the optical film 204 is heated to expand toward the sidewall 2012c and the sidewall 2012b, the two sidewalls will not block the optical film due to the avoidance gap c, and the optical film 204 can extend to the two sidewalls without causing Wrinkles to avoid causing optical defects.
  • three sidewalls such as the sidewall 2012b, the sidewall 2012c, and the sidewall 2012d, are provided with a position avoidance notch c.
  • the optical film 204 is heated to expand toward the side walls 2012b, 2012c, and 2012d, none of the three side walls will block the optical film due to the avoidance gap c, and the optical film 204 can extend to the side walls. And will not produce wrinkles, avoid causing optical defects.
  • all the sidewalls such as the sidewall 2012a, the sidewall 2012b, the sidewall 2012c, and the sidewall 2012d, are provided with an avoidance gap c.
  • the sidewall will not block the optical film due to the avoidance notch c, and the optical film 204 can extend to the sidewall without wrinkles, avoiding optical defects.
  • the light source 202 can also be arranged between two or more side walls 2012 of the light guide member 203. In all the side walls where the light source 202 is not arranged and the light source 202 is arranged, it is possible to choose whether to set the avoidance.
  • the notch c may be formed on all side walls, or may be formed on part of the side walls.
  • the width Lc of the avoidance gap c is greater than the width Lm of the optical film 204, so that when the optical film 204 expands into the avoidance gap c, it can ensure that the optical film 204 can It expands smoothly into the avoidance gap c without colliding with the side wall 2012.
  • the width Lc of the avoidance gap c is smaller than the width Lm of the optical film 204.
  • the optical film 204 is formed with a film notch 2041 in the area corresponding to the support protrusion 2013, the difference Lm between the width Lm of the optical film and the total width (LQ1+LQ2) of the film notch 2041 ', smaller than the width Lc of the avoidance gap.
  • the projection of the notch 2041 on the bottom plate 2011 is covered by the projection of the fixed frame 205 on the bottom plate 2011.
  • the side wall 2013 further includes The auxiliary support protrusion 2014 in the position gap c.
  • the auxiliary support protrusion 2014 divides the position avoidance gap c into two or more sub-avoidance gaps, as shown in (1) in Figure 5
  • the sub-avoidance gap c1 and the sub-avoidance gap c2 in order to avoid the obstruction of the auxiliary support protrusion 2014 to the optical film 204, as shown in Figure 5 (2), it is necessary to align the optical film in the area corresponding to the auxiliary support protrusion 2014
  • the sheet 204 is cut to form an auxiliary diaphragm gap 2042 in the corresponding area.
  • the width LQ3 of the diaphragm gap 2042 is greater than the width Lf of the auxiliary supporting protrusion 2014.
  • the auxiliary support protrusion 2014 in the avoidance notch c will not hinder the expansion of the optical film 204
  • the shape of the avoidance gap c is a groove, and the shape of the groove may be a right-angled rectangle, a rounded rectangle, a semicircle, a trapezoid, or a triangle without one side. At least one of the others.
  • the shape of the avoidance notch c is not limited to this, and can also be other shapes, as long as it is ensured that the optical film 204 does not contact the side wall 2012 during expansion, and its shape can be designed as required.
  • the bottom surface 2051 of the fixed frame 205 is a flat surface, and the fixed frame 205 is directly fixed on the supporting protrusion 2013. This method is simple to implement and will not be repeated.
  • the bottom surface 2051 of the fixing frame 205 is provided with a fixing notch 2052, and the fixing frame 205 is fixed to the side wall through the fixing notch 2052 and the supporting protrusion 2013 On 2012.
  • the cross-sectional shape of the fixing notch 2052 is at least one of a rectangle, a trapezoid, or a semicircle.
  • the shape of the supporting protrusion 2013 is the same as the shape of the fixing notch 2052, and the cross-sectional shape of both may be at least one of a rectangle, a trapezoid, a semicircle, or other shapes.
  • the shape of the supporting protrusion 2013 is different from the shape of the fixing notch 2052.
  • the supporting protrusion 2013 is rectangular, and the fixing notch 2052 is semicircular.
  • the shape of the supporting protrusion 2013 and the shape of the fixing notch 2052 can be designed according to requirements.
  • the height h1 of the supporting protrusion 2013 is greater than or equal to the depth h2 of the fixing notch 2052. In this way, it can be ensured that the supporting protrusion 2013 can fully extend into the fixing notch 2052 to support the fixing frame 205 and the backlight space in the vertical direction Z.
  • 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 arranged on the side wall 2012.
  • all the side walls 2012 are formed first, and then in the middle area of the side walls 2012b, a part of the side wall 2012b is cut downward along the vertical direction Z to form the avoidance gap c, and the remaining uncut parts serve as the supporting protrusions 2013. It is also possible to directly form the side wall 2012 including the avoiding notch c and the supporting protrusion 2013.
  • the backlight module 20 is a direct type backlight module.
  • the light source 202 is arranged between the light guide member 203 and the bottom plate of the bottom plate 2011, and a reflective sheet 206 is also provided between the light source 203 and the bottom plate 2011.
  • the light source 202 emits light from bottom to top.
  • the light incident surface of the light guide member 203 corresponds to the light source 202.
  • the light guide member 203 is a diffuser plate, and the diffuser plate fully diffuses the incident light emitted by the light source 202, and has a good shielding effect on lamp shadows, so that the light source is softer and more uniform.
  • a gap c is formed on the side wall 2012a and the side wall 2012b.
  • the side wall 2012 will not affect the optical film based on the gap c.
  • the sheet 204 forms a barrier, so that no wrinkles are generated and optical defects are avoided.
  • the application further provides a liquid crystal module, which includes the backlight module provided in the embodiment of the application, and a liquid crystal display panel, and the liquid crystal display panel is fixed on a fixing frame of the backlight module.
  • the liquid crystal module 40 when the liquid crystal module does not support the touch function or the touch function layer is integrated in the liquid crystal display panel, as shown in FIG. 9, the liquid crystal module 40 provided in the embodiment of the present application includes:
  • the backlight module 20 includes 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 includes a bottom plate 2011 and side walls 2012, and the bottom plate 2011 and the side walls 2012 surround In the containing cavity b, the light source 202, the light guide member 203, and the optical film 204 are arranged in the containing cavity b.
  • the light exit surface of the light source 202 corresponds to the light incident surface of the light guide member 203, and the optical film 204 is located On the light emitting surface of the light guide member 203, a fixing frame 205 is arranged on the back plate 201;
  • the liquid crystal display panel 31 is fixed on the fixing frame 205;
  • At least one side wall 2012 is provided with a avoidance notch c and support protrusions 2013 located on both sides of the avoidance notch.
  • the position of the avoidance notch c corresponds to the position of the optical film 204, and the avoidance notch
  • the height H of c is greater than or equal to the thickness d of the optical film 204, and the fixing frame 205 is disposed on the supporting protrusion 2013.
  • This embodiment provides a liquid crystal module, at least one side wall of the backlight module is provided with a position avoidance notch at a position corresponding to the optical film, and the height of the avoidance notch is greater than or equal to that of the optical film. Thickness; on the side wall provided with the avoidance gap, there are also support protrusions located on both sides of the avoidance gap, and the fixed frame is arranged on the support protrusion.
  • the sidewall is provided with a gap at the position corresponding to the optical film. When the optical film expands under heat, the deformed optical film is located in the gap, so that the sidewall will not hinder the expansion of the optical film. Furthermore, the optical film will not be wrinkled due to hindered expansion.
  • the liquid crystal display panel 31 is fixed on the fixing frame 205 of the backlight module through the adhesive layer 32, and the material of the adhesive layer 32 is usually double-sided tape or foam.
  • the liquid crystal module 40 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 liquid crystal module 40 provided in the embodiment of the present application further includes: The panel 33, the touch panel 33 is fixed on the fixing frame 205.
  • the cross section of the top surface 2053 of the fixing frame 205 is stepped, and 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 through the adhesive layer 32.
  • the material of the layer 32 is usually double-sided tape or foam.
  • An adhesive material (not shown in the figure) is also provided between the liquid crystal display panel 31 and the touch panel 33.
  • the adhesive material is usually a transparent optical adhesive or the like.
  • the width of the position avoidance gap is greater than the width of the optical film.
  • the width of the avoidance gap is smaller than the width of the optical film, and the optical film is formed in a region corresponding to the support protrusion There is a diaphragm gap, and the difference between the width of the optical diaphragm and the total width of the diaphragm gap is smaller than the width of the avoidance gap.
  • the light source is arranged between the light guide plate and at least one side wall; or, the light source is arranged between the light guide plate and the Between the bottom plates.
  • the shape of the position avoidance gap is a groove.
  • 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 light guide member. Between the floor.
  • the fixed frame includes at least one of a plastic frame, a cast aluminum part, or a sheet metal frame.
  • the bottom surface of the fixing frame is provided with a fixing notch, and the fixing frame is fixed to the fixing notch and the supporting protrusion. On the side wall.
  • the cross-sectional shape of the fixing notch is at least one of a rectangle, a trapezoid, or a semicircle.
  • the height of the supporting protrusion is greater than or equal to the depth of the fixing notch.
  • this application also provides a narrow-frame vehicle-mounted display device, which includes the liquid crystal module provided by this application.
  • This embodiment provides a narrow-frame vehicle-mounted display device, in which at least one side wall of the backlight module of the liquid crystal module is provided with a position avoidance gap at a position corresponding to the optical film.
  • the sidewall is provided with a gap at the position corresponding to the optical film.
  • the present application provides a backlight module and a liquid crystal module.
  • the backlight module includes a back plate, a light source, a light guide member, an optical film, and a fixing frame.
  • the back plate includes a bottom plate and side walls.
  • the side wall forms a accommodating cavity, the light source is arranged in the accommodating cavity, the light guide member is arranged in the accommodating cavity, the light exit surface of the light source corresponds to the light entrance surface of the light guide member, the
  • the optical film is arranged in the accommodating cavity and is located on the light emitting surface of the light guide member; the fixing frame is arranged on the back plate, and at least one side wall is provided at a position corresponding to the optical film
  • the avoidance gap, the height of the avoidance gap is greater than or equal to the thickness of the optical film.
  • a gap is provided at the position of the sidewall corresponding to the optical film.
  • the deformed optical film is located in the gap, so that the sidewall will not hinder the expansion of the optical film, and then The optical film will not be wrinkled due to the obstruction of expansion, which alleviates the technical problem that the existing backlight module for narrow-frame vehicle-mounted display devices has the technical problem of obstructed expansion of the optical film, and enhances the display stability of the narrow-frame vehicle-mounted display device.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
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Abstract

一种背光模组（20）和液晶模组（40），该背光模组（20）中背板（201）的至少一个侧壁（2012）在对应光学膜片（204）的位置设有避位缺口（c），避位缺口（c）的高度（H）大于或等于光学膜片（204）的厚度（d）。通过在侧壁（2012）对应光学膜片（204）的位置设置避位缺口（c），当光学膜片（204）受热膨胀时，形变后的光学膜片（204）位于避位缺口（c）内，光学膜片（204）不会因膨胀受阻而产生褶皱。

Description

背光模组和液晶模组 技术领域
本申请涉及显示技术领域，尤其涉及一种背光模组和液晶模组。
 背景技术
如图1所示，在现有的车载显示设备的背光模组10中，通常会使用铸铝件等钣金件作为背板101，背板101包括底板1011和侧壁1012，底板1011和侧壁1012形成容纳腔a，光源102、导光板103、光学膜层104等设置在容纳腔a内，固定框105固定在背板101上，为了实现车载显示设备的窄边框，光学膜片104等与侧壁1012之间的间隙s很小。
在高温条件下，光学膜片会发生膨胀，由于车载显示设备的光学膜片整体较大，进而因为膨胀而产生的形变量也较大，在光学膜片的形变量，大于光学膜片与侧壁之间的间隙时，光学膜片会因膨胀受阻导致褶皱，进而引起背光模组的光学不良。
因此，现有用于窄边框车载显示设备的背光模组存在光学膜片膨胀受阻的技术问题，需要改进。
 技术问题
本申请提供一种背光模组和液晶模组，以缓解现有用于窄边框车载显示设备的背光模组存在的光学膜片膨胀受阻的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种背光模组，其包括：
背板，包括底板和侧壁，所述底板和所述侧壁围成容纳腔；
光源，设置在所述容纳腔内；
导光构件，设置在所述容纳腔内，所述光源的出光面对应所述导光构件的入光面；
光学膜片，设置在所述容纳腔内，且位于所述导光构件的出光面上；
固定框，设置在所述侧壁上；
其中，至少一个侧壁设有避位缺口、以及位于所述避位缺口两侧的支撑凸起，所述避位缺口的设置位置与所述光学膜片的位置对应，所述避位缺口的高度大于或等于所述光学膜片的厚度，所述固定框设置在所述支撑凸起上。
在本申请实施例提供的背光模组中，所述避位缺口的宽度大于所述光学膜片的宽度。
在本申请实施例提供的背光模组中，所述避位缺口的宽度小于所述光学膜片的宽度，所述光学膜片在对应所述支撑凸起的区域形成有膜片缺口，所述光学膜片的宽度与所述膜片缺口总宽度之差，小于所述避位缺口的宽度。
在本申请实施例提供的背光模组中，所述光源设置在所述导光板与至少一个侧壁之间；或者，所述光源设置在所述导光板与所述底板之间。
在本申请实施例提供的背光模组中，所述避位缺口的形状为凹槽。
在本申请实施例提供的背光模组中，还包括反射片，所述反射片设置在所述容纳腔内，且位于所述导光构件和所述底板之间。
在本申请实施例提供的背光模组中，所述固定框包括胶框、铸铝件或者钣金框中的至少一种。
在本申请实施例提供的背光模组中，所述固定框的底面设有固定缺口，所述固定框通过所述固定缺口及所述支撑凸起，固定在所述侧壁上。
在本申请实施例提供的背光模组中，所述固定缺口的截面形状为矩形、梯形或半圆形中的至少一种。
在本申请实施例提供的背光模组中，所述支撑凸起的高度，大于或等于所述固定缺口的深度。
本申请实施例提供一种液晶模组，其包括：
背光模组，包括背板、光源、导光板、光学膜片以及固定框，所述背板包括底板和侧壁，所述底板和所述侧壁形成容纳腔，所述光源、导光板、光学膜片设置在所述容纳腔内，所述光源的出光面对应所述导光板的入光面，光学膜片位于所述导光板的出光面上，固定框设置在所述背板上；
液晶显示面板，固定在所述固定框上；
其中，至少一个侧壁设有避位缺口、以及位于所述避位缺口两侧的支撑凸起，所述避位缺口的设置位置与所述光学膜片的位置对应，所述避位缺口的高度大于或等于所述光学膜片的厚度，所述固定框设置在所述支撑凸起上。
在本申请实施例提供的液晶模组中，所述液晶模组还包括触控面板，所述触控面板固定在所述固定框上。
在本申请实施例提供的液晶模组中，所述避位缺口的宽度大于所述光学膜片的宽度；或者，所述避位缺口的宽度小于所述光学膜片的宽度，所述光学膜片在对应所述支撑凸起的区域形成有膜片缺口，所述光学膜片的宽度与所述膜片缺口总宽度之差，小于所述避位缺口的宽度。
在本申请实施例提供的液晶模组中，所述光源设置在所述导光板与至少一个侧壁之间；或者，所述光源设置在所述导光板与所述底板之间。
在本申请实施例提供的液晶模组中，所述避位缺口的形状为凹槽。
在本申请实施例提供的液晶模组中，还包括反射片，所述反射片设置在所述容纳腔内，且位于所述导光构件和所述底板之间。
在本申请实施例提供的液晶模组中，所述固定框包括胶框、铸铝件或者钣金框中的至少一种。
在本申请实施例提供的液晶模组中，所述固定框的底面设有固定缺口，所述固定框通过所述固定缺口及所述支撑凸起，固定在所述侧壁上。
在本申请实施例提供的液晶模组中，所述固定缺口的截面形状为矩形、梯形或半圆形中的至少一种。
在本申请实施例提供的液晶模组中，所述支撑凸起的高度，大于或等于所述固定缺口的深度。
 有益效果
本申请提供一种背光模组和液晶模组，该背光模组包括背板、光源、导光构件、光学膜片和固定框，所述背板包括底板和侧壁，所述底板和所述侧壁形成容纳腔，所述光源设置在所述容纳腔内，所述导光构件设置在所述容纳腔内，所述光源的出光面对应所述导光构件的入光面，所述光学膜片设置在所述容纳腔内，且位于所述导光构件的出光面上；所述固定框设置在所述背板上，至少一个侧壁在对应所述光学膜片的位置设有避位缺口，所述避位缺口的高度大于或等于所述光学膜片的厚度。本申请实施例通过在侧壁对应光学膜片的位置设置避位缺口，当光学膜片受热膨胀时，形变后的光学膜片位于避位缺口内，这样侧壁不会阻碍光学膜片的膨胀，进而光学膜片不会因膨胀受阻而产生褶皱，缓解了现有用于窄边框车载显示设备的背光模组存在光学膜片膨胀受阻的技术问题，增强了窄边框车载显示设备的显示稳定性，提高了用户使用体验。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，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为现有背光模组的结构示意图；
图2为本申请实施例提供的背光模组的第一种结构示意图；
图3为图2中截面A-A’的第一种截面示意图；
图4为图2中截面A-A’的第二种截面示意图；
图5为图2中截面A-A’的第三种截面示意图；
图6为图2中截面B-B’的第一种截面示意图；
图7为图2中截面B-B’的第二种截面示意图；
图8为本申请实施例提供的背光模组的第二种结构示意图；
图9为本申请实施例提供的液晶模组的第一种结构示意图；
图10为本申请实施例提供的液晶模组的第二种结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧壁]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相近的单元是用以相同标号表示。
在本申请的附图中，X代表模组的长度方向，Y代表模组的宽度方向，Z代表模组的高度方向。
针对现有用于窄边框车载显示设备的背光模组存在的光学膜片膨胀受阻的技术问题，本申请实施例可以缓解。
在一种实施例中，如图2至图8所示，本申请实施例提供的背光模组20包括：
背板201，包括底板2011和侧壁2012，所述底板2011和所述侧壁2012围成容纳腔b；
光源202，设置在所述容纳腔b内；
导光构件203，设置在所述容纳腔b内，所述光源202的出光面对应所述导光构件203的入光面；
光学膜片204，设置在所述容纳腔b内，且位于所述导光构件203的出光面上；
固定框205，设置在所述侧壁2012上；
其中，至少一个侧壁2012设有避位缺口c、以及位于避位缺口两侧的支撑凸起2013，避位缺口c的设置位置与所述光学膜片204的位置对应，所述避位缺口c的高度H大于或等于所述光学膜片204的厚度d，所述固定框205设置在所述支撑凸起2013上。
在本实施例中，高温条件下光学膜片204沿X方向膨胀，基于避位缺口c，侧壁2012不会对光学膜片204形成阻挡，光学膜片204可以向避位缺口c内延展，这样就不会产生褶皱，避免引起光学不良。
本实施例提供了一种背光模组，该背光模组包括背板、光源、导光构件、光学膜片和固定框，所述背板包括底板和侧壁，所述底板和所述侧壁形成容纳腔，所述光源设置在所述容纳腔内，所述导光构件设置在所述容纳腔内，所述光源的出光面对应所述导光构件的入光面，所述光学膜片设置在所述容纳腔内，且位于所述导光构件的出光面上；所述固定框设置在所述背板上，至少一个侧壁在对应所述光学膜片的位置设有避位缺口，所述避位缺口的高度大于或等于所述光学膜片的厚度；设置有所述避位缺口的侧壁上。本实施例通过在侧壁对应光学膜片的位置设置避位缺口，当光学膜片受热膨胀时，形变后的光学膜片位于避位缺口内，这样侧壁不会阻碍光学膜片的膨胀，进而光学膜片不会因膨胀受阻而产生褶皱，提高了用户使用体验。
在一种实施例中，背板201通常采用铁框、钣金件、铸铝件等，以保证强度和较好的散热性能。
在图2所示实施例中，背光模组20为侧入式背光模组，光源202设置在导光构件203与至少一个侧壁2012之间，通常仅在导光构件203与一个侧壁2012之间设置光源202，也可以在导光构件203与几个侧壁2012之间设置光源202，如图2所示，光源202包括灯条2021和固定在灯条2021上的LED灯2022，灯条2021固定在侧壁2012a上。
在图2所示实施例中，由于背光模组20为侧入式背光模组，导光构件203为导光板，导光板把光源202发出的侧光式水平入射光线转换为垂直出射光线，并经由导光构件203的出光面射出。导光板一般由光学级树脂材料构成，常用的有热可塑性树脂、聚碳酸酯以及亚克力等。
在一种实施例中，如图2所示，背光模组20在导光构件203下方还设置有反射片206，反射片206设置在背板201的底板2011上，导光构件203设置在反射片206上，组成反射片206的材料通常是表面镀了一层高反射率金属膜的PET（聚对苯二甲酸乙醇酯）膜，或含一个核心层（具有高反射率的聚合物树脂）的上下两层PET（聚对苯二甲酸乙醇酯）膜组合体。反射片206的主要作用是把从导光构件203中泄露出来的光载反射回去，以提高光源的利用率。
光学膜片204包括层叠设置的扩散片2041、棱镜片2042和反射型偏光增亮膜2043。扩散片2041一般采用PET（聚对苯二甲酸乙醇酯）或PC（聚碳酸酯）基材，正面光滑，反面粗糙，扩散片2041的功能是将通过导光构件203的出光面射出的光线进行多次折射、反射和散射，使得背光更加均匀。棱镜片2042是聚光装置，利用全反射和折射定律，将分散的光集中于一定的角度范围内出射从而提高该出射范围内的亮度。反射型偏光增亮膜2043也可以提高背光的亮度。
在一种实施例中，固定框205包括胶框、铸铝件或者钣金框中的至少一种，胶框采用聚碳酸酯或掺入玻璃纤维的聚碳酸酯形成，铸铝件采用铝合金形成，而钣金框则采用钣金形成，以保证支撑强度。
在一种实施例中，如图6所示，固定框205包括底面2051，底面2051设置在所述支撑凸起2013上。
侧壁在一种实施例中，如图3所示，背板201包括侧壁2012a、侧壁2012b、侧壁2012c以及侧壁2012d，侧壁2012a和侧壁2012b相对设置，侧壁2012c和侧壁2012d相对设置。
如图2及图3所示，光源202固定在侧壁2012a上，避位缺口c设置在侧壁2012b上。
在一种实施例中，在相对的两个侧壁，例如侧壁2012c和侧壁2012d上设置避位缺口c。当光学膜片204受热向侧壁2012c和侧壁2012d膨胀时，两侧壁基于避位缺口c均不会对光学膜片形成阻挡，光学膜片204可以向两侧壁延展，且不会产生褶皱，避免引起光学不良。
在一种实施例中，在相邻的两个侧壁，例如侧壁2012c和侧壁2012b上设置避位缺口c。当光学膜片204受热向侧壁2012c和侧壁2012b膨胀时，两侧壁基于避位缺口c均不会对光学膜片形成阻挡，光学膜片204可以向两侧壁延展，且不会产生褶皱，避免引起光学不良。
在一种实施例中，在三个侧壁，例如侧壁2012b、侧壁2012c和侧壁2012d上设置避位缺口c。当光学膜片204受热向侧壁2012b、侧壁2012c和侧壁2012d膨胀时，三个侧壁基于避位缺口c均不会对光学膜片形成阻挡，光学膜片204可以向侧壁延展，且不会产生褶皱，避免引起光学不良。
在一种实施例中，在所有侧壁，例如侧壁2012a、侧壁2012b、侧壁2012c和侧壁2012d上均设置避位缺口c。当光学膜片204受热向四周膨胀时，侧壁基于避位缺口c均不会对光学膜片形成阻挡，光学膜片204可以向侧壁延展，且不会产生褶皱，避免引起光学不良。
在一种实施例中，光源202还可以设置在导光构件203两个以及两个以上侧壁2012之间，未设置光源202和设置光源有202的所有侧壁中可以根据需要选择是否设置避位缺口c，可以全部侧壁上都形成避位缺口c，也可以在部分侧壁上形成避位缺口c。
在一种实施例中，如图3所示，避位缺口c的宽度Lc大于光学膜片204的宽度Lm，这样光学膜片204膨胀进入避位缺口c时，这样可以保证光学膜片204可以顺利地往避位缺口c内膨胀，不会与侧壁2012碰撞。
在一种实施例中，如图4中（1）所示，避位缺口c的宽度Lc小于光学膜片204的宽度Lm，此时，为了避免光学膜片204膨胀受阻，如图4中（2）所示，光学膜片204在对应所述支撑凸起2013的区域形成有膜片缺口2041，所述光学膜片的宽度Lm与所述膜片缺口2041总宽度（LQ1+ LQ2）之差Lm’，小于所述避位缺口的宽度Lc。这样光学膜片204膨胀时，由于光学膜片204形成有与支撑凸起2013对应的膜片缺口2041，避位缺口c两侧的支撑凸起2013就不会阻碍光学膜片204的膨胀，这样可以保证光学膜片204中设有膜片缺口2041的一段光学膜片可以顺利地往避位缺口c内膨胀，不会与侧壁2012碰撞，进而光学膜片204也不会因膨胀受阻而导致褶皱。
在一种实施例中，为了避免光学膜片204的缺口2041影响背光品质，缺口2041在底板2011上的投影，被固定框205在底板2011上的投影所覆盖。
在一种实施例中，如图5中（1）所示，在图2所示实施例的基础上，为了增强固定框205与侧壁2013的固定稳定性，侧壁2013还包括设置在避位缺口c内的辅助支撑凸起2014，此时，辅助支撑凸起2014将避位缺口c切分为两个及两个以上数量的子避位缺口，即图5中（1）所示的子避位缺口c1和子避位缺口c2，为了避免辅助支撑凸起2014对光学膜片204的阻碍，如图5中（2）所示，需要在辅助支撑凸起2014对应区域内，对光学膜片204进行切割，以在对应区域形成辅助膜片缺口2042，此时膜片缺口2042的宽度LQ3大于辅助支撑凸起2014的宽度Lf。这样光学膜片204膨胀时，由于光学膜片204形成有与辅助支撑凸起2014对应的辅助膜片缺口2042，避位缺口c内的辅助支撑凸起2014就不会阻碍光学膜片204的膨胀，这样可以保证光学膜片204中设有辅助膜片缺口2042的一段光学膜片可以顺利地往避位缺口c内膨胀，不会与侧壁2012上的辅助支撑凸起2014碰撞，进而光学膜片204也不会因膨胀受阻而导致褶皱。
在一种实施例中，如图6或图7所示，避位缺口c的形状为凹槽，凹槽的形状可以是缺少一个边的直角矩形、圆角矩形、半圆形、梯形、三角形等中的至少一种。避位缺口c形状不限于此，还可以是其他形状，只要保证膨胀时光学膜片204与侧壁2012不接触即可，可根据需要设计其形状。
在一种实施例中，如图6所示，固定框205的底面2051为平面，固定框205直接固定在支撑凸起2013上，本方式实现简单，不再赘述。
在一种实施例中，如图7所示，固定框205的底面2051设有固定缺口2052，所述固定框205通过所述固定缺口2052及所述支撑凸起2013，固定在所述侧壁2012上。
在一种实施例中，固定缺口2052的截面形状为矩形、梯形或半圆形中的至少一种。
在一种实施例中，支撑凸起2013的形状与固定缺口2052的形状相同，两者的截面形状可以均是矩形、梯形、半圆形中的至少一种，或其他形状。
在一种实施例中，支撑凸起2013的形状与固定缺口2052的形状不同，例如支撑凸起2013为矩形，固定缺口2052为半圆形等。可根据需要设计支撑凸起2013的形状与固定缺口2052的形状。
在一种实施例中，如图7所示，支撑凸起2013的高度h1，大于或等于所述固定缺口2052的深度h2。这样可以保证支撑凸起2013能完全伸入固定缺口2052中，在竖直方向Z上支撑起固定框205和背光空间。
在一种实施例中，如图7所示，支撑凸起2013的高度h1与所述固定缺口2052的深度h2之差h1- h2，等于所述避位缺口c的高度H，以使得固定框205稳定的设置在所述侧壁2012上。
避位缺口c和支撑凸起2013的形成方式有多种。
在一种实施例中，先成型所有的侧壁2012，然后在侧壁2012b的中间区域，沿竖直方向Z向下切除一部分形成避位缺口c，其余未切除的部分作为支撑凸起2013。还可以是直接成型包括避位缺口c和支撑凸起2013的侧壁2012。
在一种实施例中，如图8所示，背光模组20为直下式背光模组。光源202设置在导光构件203与底板2011的底板之间，光源203与底板2011之间还设置有反射片206，光源202自下而上发光，导光构件203的入光面对应光源202的出光面。
在本实施例中，导光构件203为扩散板，扩散板将光源202发出的入射光充分散射，并且对灯影有良好的遮蔽效果，实现光源更柔和、更均匀。
在一种实施例中，如图8所示，在侧壁2012a和侧壁2012b上形成避位缺口c，当光学膜片204受热膨胀时，侧壁2012基于避位缺口c不会对光学膜片204形成阻挡，这样就不会产生褶皱，避免引起光学不良。当然，也可以仅在一个侧壁2012上形成避位缺口c，或者在任意两个以及两个以上的侧壁2012上形成避位缺口c。
在一种实施例中，本申请还提供一种液晶模组，其包括本申请实施例提供的背光模组，以及液晶显示面板，液晶显示面板固定在所述背光模组的固定框上。
在一种实施例中，在液晶模组不支持触控功能，或者液晶显示面板内集成有触控功能层时，如图9所示，本申请实施例提供的液晶模组40包括：
背光模组20，包括背板201、光源202、导光构件203、光学膜片204、固定框205；背板201包括底板2011和侧壁2012，所述底板2011和所述侧壁2012围成容纳腔b，光源202、导光构件203、光学膜片204设置在所述容纳腔b内，所述光源202的出光面对应所述导光构件203的入光面，光学膜片204位于所述导光构件203的出光面上，固定框205设置在所述背板201上；
液晶显示面板31，固定在所述固定框205上；
其中，至少一个侧壁2012设有避位缺口c、以及位于避位缺口两侧的支撑凸起2013，避位缺口c的设置位置与所述光学膜片204的位置对应，所述避位缺口c的高度H大于或等于所述光学膜片204的厚度d，所述固定框205设置在所述支撑凸起2013上。
本实施例提供一种液晶模组，其背光模组的至少一个侧壁在对应所述光学膜片的位置设有避位缺口，所述避位缺口的高度大于或等于所述光学膜片的厚度；设置有所述避位缺口的侧壁上，还设置有位于所述避位缺口两侧的支撑凸起，所述固定框设置在所述支撑凸起上。本实施例通过在侧壁对应光学膜片的位置设置避位缺口，当光学膜片受热膨胀时，形变后的光学膜片位于避位缺口内，这样侧壁不会阻碍光学膜片的膨胀，进而光学膜片不会因膨胀受阻而产生褶皱。
液晶显示面板31通过粘合层32固定在背光模组的固定框205上，粘合层32的材料通常为双面胶或泡棉。
在一种实施例中，在液晶模组支持触控功能，且液晶显示面板内没有集成触控功能层时，如图10所示，本申请实施例提供的液晶模组40还包括：触控面板33，所述触控面板33固定在所述固定框205上。
在本实施例中，固定框205的顶面2053的截面为阶梯状，液晶显示面板31和触控面板33分别通过粘合层32固定在背光模组的固定框205的不同阶梯上，粘合层32的材料通常为双面胶或泡棉，液晶显示面板31和触控面板33之间也设置有粘结材料（图未示出），粘结材料通常为透明光学胶等。
在一种实施例中，在本申请实施例提供的液晶模组中，所述避位缺口的宽度大于所述光学膜片的宽度。
在一种实施例中，在本申请实施例提供的液晶模组中，所述避位缺口的宽度小于所述光学膜片的宽度，所述光学膜片在对应所述支撑凸起的区域形成有膜片缺口，所述光学膜片的宽度与所述膜片缺口总宽度之差，小于所述避位缺口的宽度。
在一种实施例中，在本申请实施例提供的液晶模组中，所述光源设置在所述导光板与至少一个侧壁之间；或者，所述光源设置在所述导光板与所述底板之间。
在一种实施例中，在本申请实施例提供的液晶模组中，所述避位缺口的形状为凹槽。
在一种实施例中，在本申请实施例提供的液晶模组中，背光模组20还包括反射片206，所述反射片设置在所述容纳腔内，且位于所述导光构件和所述底板之间。
在本申请实施例提供的背光模组中，所述固定框包括胶框、铸铝件或者钣金框中的至少一种。
在一种实施例中，在本申请实施例提供的液晶模组中，所述固定框的底面设有固定缺口，所述固定框通过所述固定缺口及所述支撑凸起，固定在所述侧壁上。
在一种实施例中，在本申请实施例提供的液晶模组中，所述固定缺口的截面形状为矩形、梯形或半圆形中的至少一种。
在一种实施例中，在本申请实施例提供的液晶模组中，所述支撑凸起的高度，大于或等于所述固定缺口的深度。
同时，本申请还提供一种窄边框车载显示设备，该窄边框车载显示设备包括本申请提供的液晶模组。
本实施例提供一种窄边框车载显示设备，其液晶模组的背光模组至少一个侧壁在对应光学膜片的位置设有避位缺口。本实施例通过在侧壁对应光学膜片的位置设置避位缺口，当光学膜片受热膨胀时，形变后的光学膜片位于避位缺口内，这样侧壁不会阻碍光学膜片的膨胀，进而光学膜片不会因膨胀受阻而产生褶皱，缓解了现有用于窄边框车载显示设备的背光模组存在光学膜片膨胀受阻的技术问题，增强了窄边框车载显示设备的显示稳定性，提高了用户使用体验。
根据上述实施例可知：
本申请提供一种背光模组和液晶模组，该背光模组包括背板、光源、导光构件、光学膜片和固定框，所述背板包括底板和侧壁，所述底板和所述侧壁形成容纳腔，所述光源设置在所述容纳腔内，所述导光构件设置在所述容纳腔内，所述光源的出光面对应所述导光构件的入光面，所述光学膜片设置在所述容纳腔内，且位于所述导光构件的出光面上；所述固定框设置在所述背板上，至少一个侧壁在对应所述光学膜片的位置设有避位缺口，所述避位缺口的高度大于或等于所述光学膜片的厚度。本申请通过在侧壁对应光学膜片的位置设置避位缺口，当光学膜片受热膨胀时，形变后的光学膜片位于避位缺口内，这样侧壁不会阻碍光学膜片的膨胀，进而光学膜片不会因膨胀受阻而产生褶皱，缓解了现有用于窄边框车载显示设备的背光模组存在光学膜片膨胀受阻的技术问题，增强了窄边框车载显示设备的显示稳定性，提高了用户使用体验。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种背光模组，其包括：
    背板，包括底板和侧壁，所述底板和所述侧壁围成容纳腔；
    光源，设置在所述容纳腔内；
    导光构件，设置在所述容纳腔内，所述光源的出光面对应所述导光构件的入光面；
    光学膜片，设置在所述容纳腔内，且位于所述导光构件的出光面上；
    固定框，设置在所述侧壁上；
    其中，至少一个侧壁设有避位缺口、以及位于所述避位缺口两侧的支撑凸起，所述避位缺口的设置位置与所述光学膜片的位置对应，所述避位缺口的高度大于或等于所述光学膜片的厚度，所述固定框设置在所述支撑凸起上。
  2. 如权利要求1所述的背光模组，其中，所述避位缺口的宽度大于所述光学膜片的宽度。
  3. 如权利要求1所述的背光模组，其中，所述避位缺口的宽度小于所述光学膜片的宽度，所述光学膜片在对应所述支撑凸起的区域形成有膜片缺口，所述光学膜片的宽度与所述膜片缺口总宽度之差，小于所述避位缺口的宽度。
  4. 如权利要求1所述的背光模组，其中，所述光源设置在所述导光板与至少一个侧壁之间；或者，所述光源设置在所述导光板与所述底板之间。
  5. 如权利要求1所述的背光模组，其中，所述避位缺口的形状为凹槽。
  6. 如权利要求1所述的背光模组，其中，还包括反射片，所述反射片设置在所述容纳腔内，且位于所述导光构件和所述底板之间。
  7. 如权利要求1所述的背光模组，其中，所述固定框包括胶框、铸铝件或者钣金框中的至少一种。
  8. 如权利要求1所述的背光模组，其中，所述固定框的底面设有固定缺口，所述固定框通过所述固定缺口及所述支撑凸起，固定在所述侧壁上。
  9. 如权利要求8所述的背光模组，其中，所述固定缺口的截面形状为矩形、梯形或半圆形中的至少一种。
  10. 如权利要求8所述的背光模组，其中，所述支撑凸起的高度，大于或等于所述固定缺口的深度。
  11. 一种液晶模组，其包括：
    背光模组，包括背板、光源、导光板、光学膜片以及固定框，所述背板包括底板和侧壁，所述底板和所述侧壁形成容纳腔，所述光源、导光板、光学膜片设置在所述容纳腔内，所述光源的出光面对应所述导光板的入光面，光学膜片位于所述导光板的出光面上，固定框设置在所述背板上；
    液晶显示面板，固定在所述固定框上；
    其中，至少一个侧壁设有避位缺口、以及位于所述避位缺口两侧的支撑凸起，所述避位缺口的设置位置与所述光学膜片的位置对应，所述避位缺口的高度大于或等于所述光学膜片的厚度，所述固定框设置在所述支撑凸起上。
  12. 如权利要求11所述的液晶模组，其中，所述液晶模组还包括触控面板，所述触控面板固定在所述固定框上。
  13. 如权利要求11所述的液晶模组，其中，所述避位缺口的宽度大于所述光学膜片的宽度；或者，所述避位缺口的宽度小于所述光学膜片的宽度，所述光学膜片在对应所述支撑凸起的区域形成有膜片缺口，所述光学膜片的宽度与所述膜片缺口总宽度之差，小于所述避位缺口的宽度。
  14. 如权利要求11所述的液晶模组，其中，所述光源设置在所述导光板与至少一个侧壁之间；或者，所述光源设置在所述导光板与所述底板之间。
  15. 如权利要求11所述的液晶模组，其中，所述避位缺口的形状为凹槽。
  16. 如权利要求11所述的液晶模组，其中，还包括反射片，所述反射片设置在所述容纳腔内，且位于所述导光构件和所述底板之间。
  17. 如权利要求11所述的液晶模组，其中，所述固定框包括胶框、铸铝件或者钣金框中的至少一种。
  18. 如权利要求11所述的液晶模组，其中，所述固定框的底面设有固定缺口，所述固定框通过所述固定缺口及所述支撑凸起，固定在所述侧壁上。
  19. 如权利要求18所述的液晶模组，其中，所述固定缺口的截面形状为矩形、梯形或半圆形中的至少一种。
  20. 如权利要求18所述的液晶模组，其中，所述支撑凸起的高度，大于或等于所述固定缺口的深度。
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