WO2023137779A1 - 背光模组和液晶显示装置 - Google Patents

背光模组和液晶显示装置 Download PDF

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Publication number
WO2023137779A1
WO2023137779A1 PCT/CN2022/073860 CN2022073860W WO2023137779A1 WO 2023137779 A1 WO2023137779 A1 WO 2023137779A1 CN 2022073860 W CN2022073860 W CN 2022073860W WO 2023137779 A1 WO2023137779 A1 WO 2023137779A1
Authority
WO
WIPO (PCT)
Prior art keywords
glue
notch
backlight module
gap
liquid crystal
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2022/073860
Other languages
English (en)
French (fr)
Inventor
任媛媛
李孟洁
马成序
张卓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
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 Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US17/753,052 priority Critical patent/US12092925B2/en
Publication of WO2023137779A1 publication Critical patent/WO2023137779A1/zh
Priority to US18/774,778 priority patent/US12259614B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a liquid crystal display device.
  • the glue will be fixed by setting the glue on the side of the backlight and the top surface of the optical film.
  • the glue will expand and shrink, and internal stress will be generated. This will cause the glue to warp due to its own stress, and there will be a reliability problem.
  • the existing liquid crystal display device has the technical problem that the glue will warp due to internal stress when the environment changes.
  • the embodiments of the present application provide a backlight module and a liquid crystal display device, which are used to alleviate the technical problem that the existing liquid crystal display device has a hole glue that warps due to internal stress when the environment changes.
  • An embodiment of the present application provides a backlight module, which includes:
  • a reflective sheet arranged on one side of the backboard
  • the backlight module further includes a hole glue
  • the hole glue includes a first part located at the folded edge of the back plate and a second part located at the side of the optical film away from the reflection sheet, and a gap is formed in the first part.
  • the notch extends from an edge of a side of the first part away from the second part to the second part, and one side of the notch is located at a junction of the first part and the second part.
  • the backlight module further includes:
  • a light guide plate arranged between the reflective sheet and the optical film
  • a light source arranged on one side of the light guide plate
  • the glue is provided on both sides of the back plate and the opposite side to the side where the light source is provided, and the notch is provided on at least one of the glue on both sides of the back plate and the glue on the side opposite to the side where the light source is provided.
  • the notch includes at least a first notch and a second notch, and the first notch and the second notch are spaced apart from each other in the first part of the glue.
  • the distance between the first gap and the central axis of the first part of the glue is equal to the distance between the second gap and the central axis of the first part of the glue, and the widths of the first gap and the second gap are equal.
  • the first part of the glue includes a plurality of notches, and the distribution density of the notches located in the middle region of the first part of the glue is greater than or equal to the distribution density of the notches located in the edge region of the first part of the glue.
  • the backlight module further includes a light source, the light source is disposed between the reflection sheet and the optical film, and the hole glue is disposed on at least one of the surrounding sides of the back plate.
  • the mouth glue further includes a suture-riding line, the suture-riding line is arranged at the junction of the first part and the second part, and the distance between the first part of the mouth glue and the suture-riding line is greater than or equal to the distance between the second part of the mouth glue and the suture-riding line.
  • the notch extends from the edge of the first part away from the second part to the second part, and the distance between the side of the notch near the junction and the junction of the first part and the second part is greater than zero; or the side of the notch near the junction is located in the second part.
  • an embodiment of the present application provides a liquid crystal display device, the liquid crystal display device includes a liquid crystal display panel and a backlight module, and the backlight module includes:
  • a reflective sheet arranged on one side of the backboard
  • the backlight module further includes a hole glue
  • the hole glue includes a first part located at the folded edge of the back plate and a second part located at the side of the optical film away from the reflection sheet, and a gap is formed in the first part.
  • the notch extends from an edge of a side of the first part away from the second part to the second part, and one side of the notch is located at a junction of the first part and the second part.
  • the backlight module further includes:
  • a light guide plate arranged between the reflective sheet and the optical film
  • a light source arranged on one side of the light guide plate
  • the glue is provided on both sides of the back plate and the opposite side to the side where the light source is provided, and the notch is provided on at least one of the glue on both sides of the back plate and the glue on the side opposite to the side where the light source is provided.
  • the notch includes at least a first notch and a second notch, and the first notch and the second notch are spaced apart from each other in the first part of the glue.
  • the distance between the first gap and the central axis of the first part of the glue is equal to the distance between the second gap and the central axis of the first part of the glue, and the widths of the first gap and the second gap are equal.
  • the first part of the glue includes a plurality of notches, and the distribution density of the notches located in the middle region of the first part of the glue is greater than or equal to the distribution density of the notches located in the edge region of the first part of the glue.
  • the backlight module further includes a light source, the light source is disposed between the reflection sheet and the optical film, and the hole glue is disposed on at least one of the surrounding sides of the back plate.
  • the mouth glue further includes a suture-riding line, the suture-riding line is arranged at the junction of the first part and the second part, and the distance between the first part of the mouth glue and the suture-riding line is greater than or equal to the distance between the second part of the mouth glue and the suture-riding line.
  • the distance between the first portion and the bridging seam is equal to two-thirds to four-fifths of the length of the hem of the back panel.
  • the notch extends from the edge of the first part away from the second part to the second part, and the distance between the side of the notch near the junction and the junction of the first part and the second part is greater than zero; or the side of the notch near the junction is located in the second part.
  • the width of the gap is greater than or equal to 0.5 mm.
  • the present application provides a backlight module and a liquid crystal display device;
  • the backlight module includes a backplane, a reflection sheet and an optical film, the reflection sheet is disposed on one side of the backplane, and the optical film is disposed on a side of the reflection sheet away from the backplane, wherein the backlight module further includes a hole glue, and the hole glue includes a first part located at a folded edge of the backplane and a second part located on a side of the optical film away from the reflection sheet, and the first part is formed with a gap.
  • a gap is formed in the first part of the glue, so that when the glue produces internal stress due to environmental changes, the internal stress can be released through the gap, thereby preventing the glue from warping and improving the yield of the backlight module.
  • FIG. 1 is a schematic diagram of a first type of backlight module provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of the first type of mouth glue provided in the embodiment of the present application.
  • Fig. 3 is a second schematic diagram of the mouth glue provided in the embodiment of the present application.
  • FIG. 4 is a second schematic view of the backlight module provided by the embodiment of the present application.
  • FIG. 5 is a third schematic diagram of the backlight module provided by the embodiment of the present application.
  • FIG. 6 is a fourth schematic view of the backlight module provided by the embodiment of the present application.
  • FIG. 7 is a schematic diagram of a liquid crystal display device provided by an embodiment of the present application.
  • the embodiment of the present application aims at the technical problem that the existing liquid crystal display device has the hole glue warping due to internal stress when the environment changes, and provides a backlight module and a liquid crystal display device to alleviate the above technical problem.
  • the embodiment of the present application provides a backlight module
  • the backlight module 1 includes:
  • a reflective sheet 12 is arranged on one side of the back plate 11;
  • the optical film 14 is arranged on the side of the reflection sheet 12 away from the back plate 11;
  • the backlight module 1 further includes an opening glue 15, and the opening glue 15 includes a first portion 151 located at the edge of the back plate 11 and a second portion 152 located at the side of the optical film 14 away from the reflection sheet 12, and the first portion 151 is formed with a gap 154.
  • An embodiment of the present application provides a backlight module.
  • the backlight module forms a gap in the first part of the glue, so that when the glue generates internal stress due to environmental changes, the internal stress can be released through the gap, thereby preventing the glue from warping and improving the yield of the backlight module.
  • first part and the second part of the glue are not marked in Figure 1, because the first part and the second part are not two separate parts, but the first part and the second part can be judged by the folded edge of the back plate or the joint part of the glue and the back plate. .
  • first part 151 and the second part 152 are marked separately, but in the actual design process, the first part and the second part are integrally arranged, and the two parts are determined by the bridging line 153, and the first part and the second part are not separately arranged.
  • the notch extends from the edge of the first part away from the second part to the second part, and the distance between the side of the notch near the junction and the junction of the first part and the second part is greater than zero; or the side of the notch near the junction is located in the second part.
  • the notch extends from the edge of the first part away from the second part to the second part, and the distance between the side of the notch near the junction and the junction of the first part and the second part is equal to one-third to two-thirds of the width of the first part.
  • the notch extends from the first part to the second part, and the length of the notch at the second part is equal to one-third to one-half of the width of the second part.
  • the width of the glue is long and the width is wide; and in the setting process of the gap, the gap will be set along the longitudinal direction of the glue, and the width of the gap will be set smaller. Therefore, the gap is long along the longitudinal direction of the glue, and the width of the gap is wide along the width of the glue.
  • the size can be set according to needs.
  • the notch 154 extends from the edge of the first portion 151 away from the second portion 152 to the second portion 152 , and one side of the notch 154 is located at the junction of the first portion 151 and the second portion 152 .
  • the internal stress can be released through the notch when the glue generates internal stress, and considering that the internal stress will be generated at the first part and the second part, it may be gathered at the junction of the first part and the second part, resulting in excessive stress at the junction of the first part and the second part, and the risk of warping at the junction of the first part and the second part is too high. Since this embodiment extends the notch to the junction of the first part and the second part, the internal stress can pass through No matter the internal stress is generated in the first part or the second part, it can be released through the notch, which improves the release effect of the internal stress and reduces the risk of the glue being warped.
  • the notch As for the problem of light leakage when the notch extends from the first part to the second part, since the notch only extends to the junction of the first part and the second part, the notch will not be set on the second part, that is, the notch will not be in the direction of light emission, so as to avoid the problem of light leakage in the backlight module.
  • the backlight module 1 further includes:
  • the light guide plate 13 is arranged between the reflective sheet 12 and the optical film 14;
  • the light source is arranged on one side of the light guide plate 13;
  • the mouth glue 15 is arranged on both sides of the backboard 11, and the opposite side of the side where the light source is provided, and the notch 154 is arranged on at least one of the mouth glue 15 on both sides of the backboard 11 and the mouth glue 15 on the opposite side of the light source.
  • the notch is provided on the glue on both sides of the back plate and on the glue on the side opposite to the side where the light source is arranged.
  • the cutout glue 15 includes a notch 154 , and the cutout 154 is arranged symmetrically with respect to the central axis of the first portion 151 of the cutout glue 15 .
  • the notch at least includes a first notch and a second notch, the first notch and the second notch are spaced apart from the first part of the glue, by making the notches include the first notch and the second notch, and making the first notch and the second notch spaced apart on the first part of the glue, so that when the glue has internal stress, the glue can release the internal stress through the first notch and the second notch, without the problem that it cannot be released from the notch after the internal stress is generated, so as to improve the release effect of the internal stress and reduce the stress. There is a risk of the glue sticking out.
  • the mouth glue 15 includes a plurality of gaps 154, by making the gaps set at intervals, for example, the internal stress is generated near the part of the mouth glue on the left side, then the internal stress can be released through the gap on the left side, and the internal stress of conduction can be released through the gap on the right side, and when the internal stress is generated near the part of the mouth glue on the right side, the internal stress can be released through the gap on the right side, and the internal stress of conduction can be released through the gap on the left side, and the internal stress generated in the middle part can be released through the gaps on both sides. Then the internal stress generated in different parts can be released through the gaps set at intervals, so as to prevent the glue from lifting.
  • the distance between the first notch and the central axis of the first part of the glue is equal to the distance between the second notch and the central axis of the first part of the glue, and the widths of the first notch and the second notch are equal.
  • the stress can be transmitted to the first gap and the second gap for release, and because the first gap and the second gap extend from the edge of the first part to the junction of the first part and the second part, the internal stress generated at each position in the longitudinal direction can be released to the first gap and the second gap, thereby avoiding the glue from warping .
  • the first part is divided into left and right equal-width parts based on the central axis of the first part of the glue, and then the first notch and the second notch are respectively arranged in the two equal-width parts of the first part, and the first notch and the second notch can be respectively located at the central axis of the two equal-width parts of the first part, so that the first notch and the second notch are evenly distributed, so that the internal stress can be released through the first notch and the second notch.
  • the first part of the glue can also be divided into three parts of equal width by making the first gap and the second gap.
  • the distance between the first gap and the second gap is equal to the distance between the first gap and the edge of the first part on the nearest side of the first gap, and equals the distance between the second gap and the edge of the first part on the side closest to the second gap, that is, by setting the first gap and the second gap respectively.
  • the first part of the glue includes a plurality of notches, and the distribution density of the notches located in the middle region of the first part of the glue is greater than or equal to the distribution density of the notches located in the edge region of the first part of the glue.
  • the distribution density of the gaps in the middle area of the first part of the glue is relatively large, which can improve the effect of releasing the stress from the gaps, and by making the distribution density of the gaps in the edge region smaller, the bonding effect between the glue in the edge region and the hem of the back plate is better, and the glue in the edge region is prevented from warping in the edge region due to the small bonding area. Adhesive effect of glue and backboard.
  • the distribution density of the gaps in the edge region of the first part of the glue is one-half to two-thirds of the distribution density of the gaps in the middle region of the first part of the glue.
  • the first part of the glue includes a plurality of gaps, the width of the gap located in the middle region of the first part of the glue is greater than the width of the gap located in the edge region of the first part of the glue, by making the width of the gap in the middle region of the glue be greater than the width of the gap in the edge region of the glue, so that the glue in the edge region is relatively complete, the bonding area of the glue in the edge region and the hem of the back plate is larger, and the bonding effect of the glue and the back plate is improved.
  • the backlight module 1 further includes a light source 16, the light source 16 is disposed between the reflective sheet 12 and the optical film 14, and the hole glue 15 is disposed on at least one of the surrounding sides of the back plate 11.
  • the glue is set on at least one of the four sides of the back plate, when the glue is provided on the four sides of the back plate, by setting a gap on the glue, when the internal stress is generated, the internal stress is released through the gap, thereby avoiding the glue from lifting.
  • the notches are arranged on four sides of the back plate, and by making the notches arranged on the four sides of the back plate, when the glue is subjected to internal stress, the internal stress is released through the notches, and the glue is prevented from warping.
  • the mouth glue 15 further includes a bridging suture line 153 , and the bridging suture line 153 is disposed at the junction of the first portion 151 and the second portion 152 , and the distance between the first portion 151 of the mouth glue 15 and the bridging suture line 153 is greater than or equal to the distance between the second portion 152 of the mouth glue 15 and the bridging suture line 153 .
  • the width of the first part of the glue is greater than or equal to the width of the second part of the glue, when the gap is formed in the first part of the glue, the width of the first part is larger, the bonding area of the first part and the hemming of the backboard can be increased, the bonding effect of the hemming of the first part and the backboard can be improved, and the first part can be avoided from warping.
  • the distance between the first part and the seam line is equal to two-thirds to four-fifths of the length of the hem of the backboard.
  • the width L of the notch 154 is greater than or equal to 0.5 millimeters.
  • the width of the notch can be greater than or equal to 0.5 millimeters, so that the formation position of the notch is relatively accurate, and the problem of displacement or cutting damage to the first part can be avoided.
  • the cross-sectional shape of the notch includes at least one of square, rectangle and trapezoid.
  • the notch is described in detail by taking the notch extending from the edge of the first part to the junction of the first part and the second part as an example.
  • both the first part and the second part of the glue will generate internal stress, and if the notch is extended from the edge of the first part to the junction of the first part and the second part, the internal stress of the first part and the second part can be released from the notch, so as to prevent the glue from warping, and the notch will not be placed on the second part to cause light leakage.
  • the temperature and/or humidity of the glue will change, causing the glue to expand or shrink, resulting in internal stress, and by setting a gap, the position of the gap can absorb the expansion or contraction, so that the internal stress can be released at the position of the gap, thereby avoiding the warping of the glue caused by the internal stress.
  • the notch extends from the edge of the first part away from the second part to the second part, the side of the notch close to the junction is located in the second part, and a light-shielding layer is arranged on the notch in the second part.
  • the light-shielding layer is not limited to a light-shielding material.
  • the light-shielding layer can block light and change the angle of light, including but not limited to reflecting light and refracting light, so as to prevent light from being exposed through the gap in the second part.
  • the first part of the glue includes a plurality of gaps
  • the distribution density of the gaps in the middle region of the first part of the glue is greater than or equal to the distribution density of the gaps in the edge region of the first part of the glue
  • the width of the gap in the middle region of the first part of the glue is greater than the width of the gap in the edge region of the first part of the glue.
  • the internal stress is released through the gaps in the middle area and the edge area, so that the bonding area between the edge area and the hemming of the back plate is larger, and the edge area is prevented from being lifted due to the small bonding area.
  • Other embodiments may also be combined, which will not be repeated here.
  • the optical film 14 includes a color conversion film 141 , a uniform light film 142 , a prism film 143 and a diffusion film 144 .
  • the light source includes a blue light emitting diode, a white light emitting diode or one of blue light emitting diode/red light emitting diode/green light emitting diode.
  • the embodiment of the present application provides a liquid crystal display device, the liquid crystal display device includes a liquid crystal display panel 22 and a backlight module, and the backlight module includes:
  • a reflective sheet 12 is arranged on one side of the back plate 11;
  • the optical film 14 is arranged on the side of the reflection sheet 12 away from the back plate 11;
  • the backlight module 1 further includes an opening glue 15, and the opening glue 15 includes a first portion 151 located at the edge of the back plate 11 and a second portion 152 located at the side of the optical film 14 away from the reflection sheet 12, and the first portion 151 is formed with a gap 154.
  • the present application provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal display panel and a backlight module.
  • the backlight module forms a gap in the first part of the glue, so that when the glue produces internal stress due to environmental changes, the internal stress can be released through the gap, thereby preventing the glue from warping and improving the yield of the backlight module.
  • the liquid crystal display device further includes an adhesive layer 211 disposed between the liquid crystal display panel 22 and the backlight module.
  • the notch extends from the edge of the first part away from the second part to the second part, the side of the notch close to the junction is located in the second part, and the adhesive layer is a light-shielding material.
  • the liquid crystal display panel includes a first polarizer 221 , a first substrate 222 , a liquid crystal layer 223 , a second substrate 224 and a second polarizer 225 .
  • the first substrate is an array substrate
  • the second substrate is a color filter substrate
  • the first substrate is a COA (color on array, the color filter layer is disposed on the array side) substrate.
  • the notch extends from the edge of the first part away from the second part to the second part, and one side of the notch is located at the junction of the first part and the second part.
  • the backlight module further includes:
  • a light guide plate arranged between the reflective sheet and the optical film
  • the light source is arranged on one side of the light guide plate;
  • the glue is provided on both sides of the back plate and the opposite side to the side where the light source is provided, and the notch is provided on at least one of the glue on both sides of the back plate and the glue on the side opposite to the side where the light source is provided.
  • the notch in the liquid crystal display device, includes at least a first notch and a second notch, and the first notch and the second notch are spaced apart from each other in the first part of the glue.
  • the distance between the first notch and the central axis of the first part of the glue is equal to the distance between the second notch and the central axis of the first part of the glue, and the widths of the first notch and the second notch are equal.
  • the first part of the glue includes a plurality of notches, and the distribution density of the notches located in the middle region of the first part of the glue is greater than or equal to the distribution density of the notches located in the edge region of the first part of the glue.
  • the backlight module further includes a light source, the light source is disposed between the reflection sheet and the optical film, and the hole glue is disposed on at least one of the surrounding sides of the back plate.
  • the sealant further includes a stitching line, the stitching line is arranged at the junction of the first part and the second part, and the distance between the first part of the sealant and the stitching line is greater than or equal to the distance between the second part of the sealant and the stitching line.
  • the distance between the first portion and the bridging seam is equal to two-thirds to four-fifths of the length of the hem of the back panel.
  • the notch extends from the edge of the first part away from the second part to the second part, and the distance between the side of the notch near the junction and the junction of the first part and the second part is greater than zero; or the side of the notch near the junction is located in the second part.
  • the width of the gap is greater than or equal to 0.5 mm.
  • the present application provides a backlight module and a liquid crystal display device;
  • the backlight module includes a backplane, a reflection sheet and an optical film, the reflection sheet is disposed on one side of the backplane, and the optical film is disposed on a side of the reflection sheet away from the backplane, wherein the backlight module further includes a hole glue, and the hole glue includes a first part located at a folded edge of the backplane and a second part located on a side of the optical film away from the reflection sheet, and the first part is formed with a gap.
  • a gap is formed in the first part of the glue, so that when the glue produces internal stress due to environmental changes, the internal stress can be released through the gap, thereby preventing the glue from warping and improving the yield of the backlight module.
  • a backlight module and a liquid crystal display device provided by the embodiments of the present application have been introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the application.

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Abstract

一种背光模组（1）和液晶显示装置；背光模组（1）通过在口子胶（15）的第一部分（151）形成缺口（154），使得在口子胶（15）因环境变化产生内应力时，内应力可以通过缺口（154）释放，从而避免口子胶（15）出现翘曲，提高背光模组（1）的良率。

Description

背光模组和液晶显示装置 技术领域
本申请涉及显示技术领域，尤其是涉及一种背光模组和液晶显示装置。
 背景技术
随着显示器件的发展，现有显示器件对信赖性的要求越来越高。在液晶显示器件中，会通过将口子胶设置在背光侧面和光学膜片顶面进行固定，但在液晶显示器件的测试和使用过程中，在环境变化时，口子胶会出现膨胀收缩，产生内应力，导致口子胶因自身应力发生翘起的问题，出现信赖性问题。
所以，现有液晶显示器件存在口子胶在环境变化时会因内应力产生翘起的技术问题。
 技术问题
本申请实施例提供一种背光模组和液晶显示装置，用以缓解现有液晶显示器件存在口子胶在环境变化时会因内应力产生翘起的技术问题。
 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，该背光模组包括：
背板；
反射片，设置于所述背板一侧；
光学膜片，设置于所述反射片远离所述背板的一侧；
其中，所述背光模组还包括口子胶，所述口子胶包括位于所述背板的折边的第一部分和位于所述光学膜片远离所述反射片一侧的第二部分，所述第一部分形成有缺口。
在一些实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口的一侧位于所述第一部分和所述第二部分的交界处。
在一些实施例中，所述背光模组还包括：
导光板，设置于所述反射片和所述光学膜片之间；
光源，设置于所述导光板一侧；
其中，所述口子胶设置于所述背板的两侧，以及设置有光源一侧的相对侧，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶中的至少一个上。
在一些实施例中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分。
在一些实施例中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。
在一些实施例中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。
在一些实施例中，所述背光模组还包括光源，所述光源设置于所述反射片和所述光学膜片之间，所述口子胶设置于所述背板的四周侧面中的至少一个上。
在一些实施例中，所述口子胶还包括骑缝线，所述骑缝线设置于所述第一部分和所述第二部分的交界处，所述口子胶的第一部分与所述骑缝线之间的距离，大于或者等于所述口子胶的第二部分与所述骑缝线之间的距离。
在一些实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。
同时，本申请实施例提供一种液晶显示装置，该液晶显示装置包括液晶显示面板和背光模组，所述背光模组包括：
背板；
反射片，设置于所述背板一侧；
光学膜片，设置于所述反射片远离所述背板的一侧；
其中，所述背光模组还包括口子胶，所述口子胶包括位于所述背板的折边的第一部分和位于所述光学膜片远离所述反射片一侧的第二部分，所述第一部分形成有缺口。
在一些实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口的一侧位于所述第一部分和所述第二部分的交界处。
在一些实施例中，所述背光模组还包括：
导光板，设置于所述反射片和所述光学膜片之间；
光源，设置于所述导光板一侧；
其中，所述口子胶设置于所述背板的两侧，以及设置有光源一侧的相对侧，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶中的至少一个上。
在一些实施例中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分。
在一些实施例中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。
在一些实施例中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。
在一些实施例中，所述背光模组还包括光源，所述光源设置于所述反射片和所述光学膜片之间，所述口子胶设置于所述背板的四周侧面中的至少一个上。
在一些实施例中，所述口子胶还包括骑缝线，所述骑缝线设置于所述第一部分和所述第二部分的交界处，所述口子胶的第一部分与所述骑缝线之间的距离，大于或者等于所述口子胶的第二部分与所述骑缝线之间的距离。
在一些实施例中，所述第一部分与所述骑缝线之间的距离，等于所述背板的折边的长度的三分之二至五分之四。
在一些实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。
在一些实施例中，所述缺口的宽度大于或者等于0.5毫米。
 有益效果
本申请提供一种背光模组和液晶显示装置；该背光模组包括背板、反射片和光学膜片，反射片设置于背板一侧，光学膜片设置于反射片远离背板的一侧，其中，背光模组还包括口子胶，口子胶包括位于背板的折边的第一部分和位于光学膜片远离反射片一侧的第二部分，第一部分形成有缺口。本申请通过在口子胶的第一部分形成缺口，使得在口子胶因环境变化产生内应力时，内应力可以通过缺口释放，从而避免口子胶出现翘曲，提高背光模组的良率。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本申请实施例提供的背光模组的第一种示意图。
图2为本申请实施例提供的口子胶的第一种示意图。
图3为本申请实施例提供的口子胶的第二种示意图。
图4为本申请实施例提供的背光模组的第二种示意图。
图5为本申请实施例提供的背光模组的第三种示意图。
图6为本申请实施例提供的背光模组的第四种示意图。
图7为本申请实施例提供的液晶显示装置的示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例针对现有液晶显示器件存在口子胶在环境变化时会因内应力产生翘起的技术问题，提供一种背光模组和液晶显示装置，用以缓解上述技术问题。
如图1、图2所示，本申请实施例提供一种背光模组，该背光模组1包括：
背板11；
反射片12，设置于所述背板11一侧；
光学膜片14，设置于所述反射片12远离所述背板11的一侧；
其中，所述背光模组1还包括口子胶15，所述口子胶15包括位于所述背板11的折边的第一部分151和位于所述光学膜片14远离所述反射片12一侧的第二部分152，所述第一部分151形成有缺口154。
本申请实施例提供一种背光模组，该背光模组通过在口子胶的第一部分形成缺口，使得在口子胶因环境变化产生内应力时，内应力可以通过缺口释放，从而避免口子胶出现翘曲，提高背光模组的良率。
需要说明的是，在图1中未标示出口子胶的第一部分和第二部分，因为第一部分和第二部分为整体，并不是分离的两个部分，但可以通过背板的折边或者口子胶与背板的结合部分判断第一部分和第二部分，例如图1中，背板的折边的边缘上的为口子胶的第二部分，或者口子胶与背板的折边的侧面接触的部分为第一部分，口子胶与背板的折边的顶面接触的部分为第二部分。
需要说明的是，在图2中，第一部分151和第二部分152分别标示，但在实际设计过程中，第一部分和第二部分一体设置，通过骑缝线153确定两个部分，第一部分和第二部分并不是分离设置。
在一种实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。通过将缺口设置在第一部分上，使得缺口靠近交界处的一侧与第一部分和第二部分的交界处的距离大于零，从而使得产生内应力时，内应力能够从缺口处释放，从而避免口子胶出现翘起；或者通过使得缺口从第一部分延伸至第二部分，通过第一部分和第二部分上的缺口进行应力的释放，无论第一部分还是第二部分产生内应力，均可以进行释放。
具体的，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离等于所述第一部分的宽度的三分之一至三分之二。通过使得缺口向第一部分与第二部分的交界处延伸，使得缺口具有一定的长度，能够较好的释放内应力。
具体的，所述缺口从所述第一部分延伸至所述第二部分，所述缺口位于所述第二部分的长度等于所述第二部分的宽度的三分之一至二分之一。通过使得缺口在第一部分和第二部分上设置，使得在口子胶的第一部分和第二部分产生应力时，缺口均能较好的释放内应力。
需要说明的是，由于口子胶的横向的长度大于纵向的长度，因此，口子胶的横向为长，纵向为宽；而缺口的设置过程中，缺口会沿口子胶的纵向设置，缺口宽度会设置较小，因此，缺口沿口子胶的纵向为长，缺口沿口子胶的横向为宽，在下述实施例中不再赘述，但需要说明的是，此处并不限定缺口的纵向的长度大于缺口的横向的长度，缺口的长和宽的大小可以根据需求设置。
针对缺口与第一部分和第二部分的交界处存在距离会导致应力释放效果较差，以及缺口从第一部分延伸到第二部分时，可能导致漏光的问题。在一种实施例中，如图2所示，所述缺口154从所述第一部分151远离所述第二部分152的一侧的边缘向所述第二部分152延伸，所述缺口154的一侧位于所述第一部分151和所述第二部分152的交界处。通过使得缺口从第一部分延伸至第一部分和第二部分的交界处，使得在口子胶产生内应力时，内应力可以通过缺口进行释放，且考虑到内应力会在第一部分和第二部分产生，具体可能会聚集在第一部分和第二部分的交界处，导致第一部分和第二部分的交界处的应力过大，第一部分和第二部分的交界处的翘起风险过大，由于本实施例通过将缺口延伸至第一部分和第二部分的交界处，因此，内应力可以通过缺口进行释放，无论第一部分还是第二部分产生内应力，均可以通过该缺口释放，提高内应力的释放效果，降低口子胶翘起的风险；而针对缺口从第一部分延伸到第二部分时，可能导致漏光的问题，由于缺口仅延伸至第一部分和第二部分的交界处，缺口不会设置在第二部分上，即缺口不会处于光线的出光方向上，避免背光模组出现漏光问题。
在一种实施例中，如图1至图4所示，所述背光模组1还包括：
导光板13，设置于所述反射片12和所述光学膜片14之间；
光源，设置于所述导光板13一侧；
其中，所述口子胶15设置于所述背板11的两侧，以及设置有光源一侧的相对侧，所述缺口154设置于所述背板11的两侧的口子胶15和设置有光源一侧的相对侧的口子胶15中的至少一个上。通过使口子胶设置在背板的三个侧边，使得在侧入式光源的入光侧通过设置U型折边，不用贴附口子胶，而其他三侧设置口子胶时，通过在口子胶上设置缺口，使得在产生内应力时，通过缺口释放内应力，从而避免口子胶出现翘起。
具体的，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶上。通过使得缺口设置在背板的三个侧边的口子胶上，使得在口子胶受到内应力时，通过缺口释放内应力，从而避免口子胶出现翘起。
在一种实施例中，如图3所示，所述口子胶15包括一个缺口154，所述缺口154关于所述口子胶15的第一部分151的中轴线对称设置。通过设置一个缺口，使得在口子胶受到内应力时，通过缺口释放内应力，从而避免口子胶出现翘起。
针对口子胶的不同部位会产生内应力导致口子胶翘起的问题。在一种实施例中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分，通过使缺口包括第一缺口和第二缺口，并使得第一缺口和第二缺口在口子胶的第一部分上间隔设置，使得在口子胶存在内应力时，口子胶可以通过第一缺口和第二缺口释放内应力，而不会存在内应力产生后无法从缺口处释放的问题，提高内应力的释放效果，降低口子胶出现翘起的风险。
具体的，如图2所示，口子胶15包括多个缺口154，通过使得缺口间隔设置，例如内应力产生于靠近左侧的口子胶的部分，则可以通过左侧的缺口进行内应力的释放，且通过右侧的缺口释放传导的内应力，而在内应力产生于靠近右侧的口子胶的部分时，可以通过右侧的缺口进行内应力的释放，且通过左侧的缺口释放传导的内应力，而产生于中间部位的内应力可以通过两侧的缺口进行释放，则可以通过间隔设置的缺口对不同部位产生的内应力进行释放，避免口子胶出现翘起。
在一种实施例中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。通过使得第一缺口和第二缺口均匀分别在口子胶的第一部分上，使得口子胶在产生内应力时，无论内应力从哪里产生，由于口子胶的第一缺口和第二缺口均匀设置，使得应力可以传导至第一缺口和第二缺口进行释放，而由于第一缺口和第二缺口从第一部分的边缘延伸至第一部分与第二部分的交界处，使得纵向的各个部位产生的内应力均可以释放至第一缺口和第二缺口，从而避免口子胶出现翘起。
具体的，例如第一缺口和第二缺口仅包括一个时，以口子胶的第一部分的中轴线为基准，将第一部分分为左右两个等宽的部分，然后将第一缺口和第二缺口分别设置在第一部分的两个等宽的部分内，且可以使得第一缺口和第二缺口分别位于第一部分的两个等宽的部分的中轴线处，从而使得第一缺口和第二缺口均匀分布，使得内应力可以通过第一缺口和第二缺口释放。
具体的，还可以通过使第一缺口和第二缺口将口子胶的第一部分分为等宽的三个部分，此时第一缺口与第二缺口的距离，等于第一缺口与第一部分上与第一缺口最近一侧的边缘的距离，且等于第二缺口与第一部分上与第二缺口最近一侧的边缘的距离，即通过将第一缺口和第二缺口分别设置的第一部分的三分之一处和三分之二处，使得第一缺口和第二缺口将口子胶分为三等分部分，从而使得在内应力产生时，内应力可以向第一缺口和第二缺口进行传导并释放，从而避免了口子胶出现翘起。
在一种实施例中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。通过使得口子胶的第一部分中间区域的缺口的分布密度，大于或者等于口子胶的第一部分的缺口的分布密度，使得在口子胶出现内应力时，由于中间区域的缺口的分布密度相对较大，可以提高缺口释放应力的效果，而通过使得边缘区域的缺口的分布密度较小，使得边缘区域的口子胶与背板的折边的贴合效果较好，避免口子胶在边缘区域由于贴合面积较小导致口子胶在边缘区域出现翘起，提高口子胶与背板的贴合效果。
具体的，口子胶的第一部分的边缘区域的缺口的分布密度，为所述口子胶的第一部分的中间区域的缺口的分布密度的二分之一至三分之二，通过减少口子胶的边缘区域的缺口，使得边缘区域与背板的折边的贴合面积较大，避免边缘区域由于贴合面积过小导致口子胶出现翘起。
在一种实施例中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的宽度，大于位于所述口子胶的第一部分的边缘区域的缺口的宽度，通过使得口子胶位于中间区域的缺口的宽度大于口子胶位于边缘区域的缺口的宽度，使得在边缘区域的口子胶较为完整，口子胶在边缘区域与背板的折边的贴合面积较大，提高口子胶与背板的贴合效果。
在一种实施例中，如图5、图6所示，所述背光模组1还包括光源16，所述光源16设置于所述反射片12和所述光学膜片14之间，所述口子胶15设置于所述背板11的四周侧面中的至少一个上。通过使口子胶设置在背板的四个侧面中的至少一个上，使得在背板的四个侧面设置口子胶时，通过在口子胶上设置缺口，使得在产生内应力时，通过缺口释放内应力，从而避免口子胶出现翘起。
具体的，所述缺口设置于所述背板的四个侧面上，通过使得缺口设置在背板的四个侧面上，使得在口子胶受到内应力时，通过缺口释放内应力，避免口子胶出现翘起。
针对第一部分形成缺口时，会导致第一部分与背板折边的贴合面积变小导致脱离的问题。在一种实施例中，如图2所示，所述口子胶15还包括骑缝线153，所述骑缝线153设置于所述第一部分151和所述第二部分152的交界处，所述口子胶15的第一部分151与所述骑缝线153之间的距离，大于或者等于所述口子胶15的第二部分152与所述骑缝线153之间的距离。通过使得口子胶的第一部分的宽度大于或者等于口子胶的第二部分的宽度，使得在口子胶的第一部分形成缺口时，第一部分的宽度较大，可以增大第一部分与背板的折边的贴合面积，提高第一部分和背板的折边的贴合效果，避免第一部分出现翘起。
具体的，第一部分与骑缝线之间的距离，等于所述背板的折边的长度的三分之二至五分之四，通过使得第一部分与背板的折边的贴合部分的面积较大，使得第一部分和背板的折边的贴合效果较好，避免第一部分出现脱落，而背板的折边在与底边接触部位为曲面，可以不与第一部分贴合。
在一种实施例中，如图2所示，所述缺口154的宽度L大于或者等于0.5毫米，为了提高缺口的裁切精度，可以使得缺口的宽度大于或者等于0.5毫米，从而使得缺口的形成位置较为准确，避免出现移位或者裁切损伤第一部分的问题。
在一种实施例中，所述缺口的截面形状包括正方形、长方形、梯形中的至少一种。
上述实施例中以缺口从第一部分的边缘延伸至第一部分和第二部分的交界处为例进行了详细说明。在本申请实施例中，针对口子胶的第一部分和第二部分均会产生内应力，将缺口从第一部分的边缘延伸至第一部分和第二部分的交界处，则第一部分和第二部分的内应力均可以从缺口释放，避免口子胶出现翘起，而缺口不会设置在第二部分上导致漏光问题。
具体的，口子胶在环境变化时，例如使用状态或者测试状态下，出现温度和/或湿度的变化，导致口子胶会出现膨胀或者收缩，产生内应力，而通过设置缺口，使得缺口位置能够吸收膨胀或者收缩的部分，使得内应力在缺口位置进行释放，从而避免内应力导致口子胶出现翘起。
在一种实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧位于所述第二部分，位于所述第二部分的缺口上设置有遮光层。在缺口设置第二部分时，可以进一步增强口子胶的内应力的释放效果，通过在第二部分的缺口上设置遮光层，使得光线不会从第二部分的缺口处漏出，避免在对口子胶的内应力进行释放时导致背光模组出现漏光问题。
具体的，遮光层并不限定为遮光材料，遮光层可以是通过对光线进行遮挡、对光线的角度进行改变：包括但不限于反射光线，折射光线，以避免光线从第二部分的缺口露出。
需要说明的是，上述实施例中分别从各个角度对开口的结构、形状、分布密度、设置位置等进行了详细说明。但本申请实施例并不是限定每一实施例仅能对开口的结构、形状、分布密度、设置位置进行说明，而是在各实施例不产生冲突时，可以将多个实施例结合。例如，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度，且位于所述口子胶的第一部分的中间区域的缺口的宽度，大于位于所述口子胶的第一部分的边缘区域的缺口的宽度，通过减少口子胶的边缘区域的缺口，并使得边缘区域的缺口的宽度小于中间区域的缺口的宽度，使得在口子胶出现内应力时，通过中间区域和边缘区域的缺口释放内应力的同时，使得边缘区域与背板的折边的贴合面积较大，避免边缘区域由于贴合面积过小导致口子胶出现翘起。对于其他的实施例也可以结合，在此不再赘述。
在一种实施例中，如图1所示，所述光学膜片14包括色转换膜141、匀光膜142、棱镜片143和扩散片144。
在一种实施例中，光源包括蓝光发光二极管、白光发光二极管或者蓝光发光二极管/红光发光二极管/绿光发光二极管中的一种。
同时，如图2、图7所示，本申请实施例提供一种液晶显示装置，该液晶显示装置包括液晶显示面板22和背光模组，所述背光模组包括：
背板11；
反射片12，设置于所述背板11一侧；
光学膜片14，设置于所述反射片12远离所述背板11的一侧；
其中，所述背光模组1还包括口子胶15，所述口子胶15包括位于所述背板11的折边的第一部分151和位于所述光学膜片14远离所述反射片12一侧的第二部分152，所述第一部分151形成有缺口154。
本申请提供一种液晶显示装置，该液晶显示装置包括液晶显示面板和背光模组，该背光模组通过在口子胶的第一部分形成缺口，使得在口子胶因环境变化产生内应力时，内应力可以通过缺口释放，从而避免口子胶出现翘曲，提高背光模组的良率。
在一种实施例中，如图7所示，所述液晶显示装置还包括粘合层211，所述粘合层211设置于所述液晶显示面板22和背光模组之间。
在一种实施例中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧位于所述第二部分，所述粘合层为遮光材料，通过使得粘合层位遮光材料，在缺口设置在第二部分时，光线不会从缺口处漏出，从而使得在缺口释放口子胶的内应力的同时，避免缺口处出现漏光。
在一种实施例中，如图7所示，所述液晶显示面板包括第一偏光片221、第一基板222、液晶层223、第二基板224和第二偏光片225。
在一种实施例中，第一基板为阵列基板，第二基板为彩膜基板，或者第一基板为COA（color on array，彩膜层设置在阵列侧）基板。
在一种实施例中，在液晶显示装置中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口的一侧位于所述第一部分和所述第二部分的交界处。
在一种实施例中，在液晶显示装置中，所述背光模组还包括：
导光板，设置于所述反射片和所述光学膜片之间；
光源，设置于所述导光板一侧；
其中，所述口子胶设置于所述背板的两侧，以及设置有光源一侧的相对侧，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶中的至少一个上。
在一种实施例中，在液晶显示装置中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分。
在一种实施例中，在液晶显示装置中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。
在一种实施例中，在液晶显示装置中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。
在一种实施例中，在液晶显示装置中，所述背光模组还包括光源，所述光源设置于所述反射片和所述光学膜片之间，所述口子胶设置于所述背板的四周侧面中的至少一个上。
在一种实施例中，在液晶显示装置中，所述口子胶还包括骑缝线，所述骑缝线设置于所述第一部分和所述第二部分的交界处，所述口子胶的第一部分与所述骑缝线之间的距离，大于或者等于所述口子胶的第二部分与所述骑缝线之间的距离。
在一种实施例中，所述第一部分与所述骑缝线之间的距离，等于所述背板的折边的长度的三分之二至五分之四。
在一种实施例中，在液晶显示装置中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。
在一种实施例中，所述缺口的宽度大于或者等于0.5毫米。
根据以上实施例可知：
本申请提供一种背光模组和液晶显示装置；该背光模组包括背板、反射片和光学膜片，反射片设置于背板一侧，光学膜片设置于反射片远离背板的一侧，其中，背光模组还包括口子胶，口子胶包括位于背板的折边的第一部分和位于光学膜片远离反射片一侧的第二部分，第一部分形成有缺口。本申请通过在口子胶的第一部分形成缺口，使得在口子胶因环境变化产生内应力时，内应力可以通过缺口释放，从而避免口子胶出现翘曲，提高背光模组的良率。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种背光模组和液晶显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种背光模组，其包括：
    背板；
    反射片，设置于所述背板一侧；
    光学膜片，设置于所述反射片远离所述背板的一侧；
    其中，所述背光模组还包括口子胶，所述口子胶包括位于所述背板的折边的第一部分和位于所述光学膜片远离所述反射片一侧的第二部分，所述第一部分形成有缺口。
  2. 如权利要求1所述的背光模组，其中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口的一侧位于所述第一部分和所述第二部分的交界处。
  3. 如权利要求2所述的背光模组，其中，所述背光模组还包括：
    导光板，设置于所述反射片和所述光学膜片之间；
    光源，设置于所述导光板一侧；
    其中，所述口子胶设置于所述背板的两侧，以及设置有光源一侧的相对侧，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶中的至少一个上。
  4. 如权利要求2所述的背光模组，其中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分。
  5. 如权利要求4所述的背光模组，其中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。
  6. 如权利要求2所述的背光模组，其中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。
  7. 如权利要求2所述的背光模组，其中，所述背光模组还包括光源，所述光源设置于所述反射片和所述光学膜片之间，所述口子胶设置于所述背板的四周侧面中的至少一个上。
  8. 如权利要求1所述的背光模组，其中，所述口子胶还包括骑缝线，所述骑缝线设置于所述第一部分和所述第二部分的交界处，所述口子胶的第一部分与所述骑缝线之间的距离，大于或者等于所述口子胶的第二部分与所述骑缝线之间的距离。
  9. 如权利要求1所述的背光模组，其中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。
  10. 一种液晶显示装置，其包括液晶显示面板和背光模组，所述背光模组包括：
    背板；
    反射片，设置于所述背板一侧；
    光学膜片，设置于所述反射片远离所述背板的一侧；
    其中，所述背光模组还包括口子胶，所述口子胶包括位于所述背板的折边的第一部分和位于所述光学膜片远离所述反射片一侧的第二部分，所述第一部分形成有缺口。
  11. 如权利要求10所述的液晶显示装置，其中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口的一侧位于所述第一部分和所述第二部分的交界处。
  12. 如权利要求11所述的液晶显示装置，其中，所述背光模组还包括：
    导光板，设置于所述反射片和所述光学膜片之间；
    光源，设置于所述导光板一侧；
    其中，所述口子胶设置于所述背板的两侧，以及设置有光源一侧的相对侧，所述缺口设置于所述背板的两侧的口子胶和设置有光源一侧的相对侧的口子胶中的至少一个上。
  13. 如权利要求11所述的液晶显示装置，其中，所述缺口至少包括第一缺口和第二缺口，所述第一缺口和所述第二缺口间隔设置于所述口子胶的第一部分。
  14. 如权利要求13所述的液晶显示装置，其中，所述第一缺口与所述口子胶的第一部分的中轴线的距离，等于所述第二缺口与所述口子胶的第一部分的中轴线的距离，且所述第一缺口和所述第二缺口的宽度相等。
  15. 如权利要求11所述的液晶显示装置，其中，所述口子胶的第一部分包括多个缺口，位于所述口子胶的第一部分的中间区域的缺口的分布密度，大于或者等于位于所述口子胶的第一部分的边缘区域的缺口的分布密度。
  16. 如权利要求11所述的液晶显示装置，其中，所述背光模组还包括光源，所述光源设置于所述反射片和所述光学膜片之间，所述口子胶设置于所述背板的四周侧面中的至少一个上。
  17. 如权利要求10所述的液晶显示装置，其中，所述口子胶还包括骑缝线，所述骑缝线设置于所述第一部分和所述第二部分的交界处，所述口子胶的第一部分与所述骑缝线之间的距离，大于或者等于所述口子胶的第二部分与所述骑缝线之间的距离。
  18. 如权利要求17所述的液晶显示装置，其中，所述第一部分与所述骑缝线之间的距离，等于所述背板的折边的长度的三分之二至五分之四。
  19. 如权利要求10所述的液晶显示装置，其中，所述缺口从所述第一部分远离所述第二部分的一侧的边缘向所述第二部分延伸，所述缺口靠近交界处的一侧与所述第一部分和所述第二部分的交界处的距离大于零；或者所述缺口靠近交界处的一侧位于所述第二部分。
  20. 如权利要求19所述的液晶显示装置，其中，所述缺口的宽度大于或者等于0.5毫米。
PCT/CN2022/073860 2022-01-18 2022-01-25 背光模组和液晶显示装置 Ceased WO2023137779A1 (zh)

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