WO2017219724A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2017219724A1
WO2017219724A1 PCT/CN2017/077871 CN2017077871W WO2017219724A1 WO 2017219724 A1 WO2017219724 A1 WO 2017219724A1 CN 2017077871 W CN2017077871 W CN 2017077871W WO 2017219724 A1 WO2017219724 A1 WO 2017219724A1
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WO
WIPO (PCT)
Prior art keywords
light guide
concave
backlight module
guide plate
convex structure
Prior art date
Application number
PCT/CN2017/077871
Other languages
English (en)
French (fr)
Inventor
盖欣
陈秀云
王洁琼
尹大根
张志丹
刘淼
杜景军
黄宝成
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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.)
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Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/565,900 priority Critical patent/US10288936B2/en
Publication of WO2017219724A1 publication Critical patent/WO2017219724A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—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
    • G02B6/0081—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
    • G02B6/0085—Means for removing heat created by the light source from 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
    • G02F1/133314—Back frames
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • G02F2201/503—Arrangements improving the resistance to shock

Definitions

  • the present application relates to the field of display, and in particular, to a backlight module and a display device.
  • a light guide plate is mainly used to convert a point light source or a line light source into a surface light source, which can be applied to a flat display device such as a liquid crystal display, a notebook computer, a digital camera, a monitor, and a projector to provide uniform brightness.
  • a flat display device such as a liquid crystal display, a notebook computer, a digital camera, a monitor, and a projector to provide uniform brightness.
  • the surface light source output enables the flat display device to display images properly.
  • the light guide plate is placed on the back plate.
  • the light guide plate cannot be firmly fixed.
  • One of the purposes of the present application is to provide a backlight module and a display device.
  • a light guide plate disposed on the back plate and at least one side of the light guide plate includes at least one first concave-convex structure
  • At least one limiting member disposed on the backboard including at least one second relief structure, the at least one second relief structure and the at least one first relief structure being capable of mating with each other and capable of being opposite Rotating in the plane in which the light guide plates are located, such that the contact state between the first concave-convex structure and the second concave-convex structure that are engaged with each other is switched between the abutting contact and the mutual engagement.
  • the backlight module further includes a groove or a protrusion on at least one side of the light guide plate, and the first concave-convex structure is correspondingly disposed on the groove or the protrusion.
  • the surface of the groove or projection is adapted to the contour of the corresponding stop member.
  • the groove or projection is curved.
  • the at least one first relief structure is disposed directly on a side of the light guide.
  • the backlight module includes a plurality of first relief structures and second relief structures that cooperate with each other such that the light guides are positioned at least in a triangular positioning manner.
  • one of the at least one first relief structure and one of the at least one second relief structure are mated with each other;
  • One of the at least one first relief structure and the more than one of the at least one second relief structure are mated with each other;
  • More than one first relief structure of the at least one first relief structure and one of the at least one second relief structure cooperate with each other.
  • the first relief structure is positioned at an upper, intermediate or lower position on either side of the light guide and in any combination of the above.
  • the backlight module further includes an elastic member coupled to the limiting member for controlling rotation of the second concave-convex structure.
  • the resilient member comprises a torsion spring or an elastic spring.
  • the light guide plate has a first state in which the light guide plate is not thermally expanded, and a second state in which the light guide plate is thermally expanded;
  • the first protrusion on the first concave-convex structure is in contact with the first protrusion of the second concave-convex structure
  • the second concave-convex structure is pressed by the light guide plate to overcome the elastic component of the backlight module to rotate in the first direction, thereby causing the first a concave-convex structure and the second concave-convex structure intermeshing;
  • first direction is selected to be one of a clockwise direction and a counterclockwise direction and the second direction is correspondingly selected as the other of the clockwise direction and the counterclockwise direction.
  • the stop member is a gear.
  • the gear is made of steel or plastic.
  • the backlight module further includes a connecting member or an adhesive between the limiting member and the elastic member, the connecting member or the adhesive disposing the limiting member on the backboard .
  • the connecting member includes a fixed connection or an integrally formed stud of the limiting member Or pin.
  • the back plate is provided with a through hole or a groove
  • the connecting member is disposed in the through hole or the groove
  • the second concave-convex structure is pressed by the light guide plate to be connected
  • the component is a shaft that rotates relative to the first relief structure in a plane in which the backlight is located.
  • a display device comprising the backlight module as described above.
  • FIG. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a backlight module according to another embodiment of the present application.
  • FIG. 3 is a schematic view showing the relative positional relationship between the side of the light guide plate of FIG. 2 and the limiting member in an unexpanded state;
  • FIG. 4 is a schematic view showing the relative positional relationship between the side of the light guide plate of FIG. 2 and the limiting member in an expanded state;
  • Figure 5 is a schematic structural view of the limiting member and the connecting member of Figure 2;
  • FIG. 6 is a schematic structural view of another modification of the backlight module of the present application.
  • FIG. 7 is a schematic structural view of another modification of the backlight module of the present application.
  • the light guide plate 2 is disposed on the back plate 1 , and a surface of the light guide plate 2 contacting the back plate 1 is provided with a groove for fixedly engaging with the back plate, due to the backlight.
  • the heat causes the light guide plate 2 to expand in the horizontal direction, and the groove needs to have a certain margin space for expansion (shown by the reference mark GAP in Fig. 1).
  • the backlight is not securely fixed to the back plate without being heated, and it is easy to shake during the moving process, resulting in structural damage.
  • the fixing of the light guide plate and the back plate becomes relatively firm.
  • a backlight module including: a back plate 1 , a light guide plate 2 disposed on the back plate 1 , and at least one limiting member 3 disposed on the back plate 1 .
  • At least one side edge 24 of the light guide plate 2 includes at least one first relief structure 22.
  • At least one groove 21 is also provided on at least one side of the panel 1.
  • the first uneven structure 22 is correspondingly disposed on the groove 21 of the light guide plate 1, for example, on the surface of the groove 21. It is shown in Fig. 2 that two grooves 21 and two first uneven structures 22 are provided at both the upper and lower ends of the left and right sides of the light guide plate 1. It will be understood by those skilled in the art that the number of the grooves 21 and the first uneven structure 22 is not limited thereto, and the number and position thereof can be set according to actual needs.
  • the first relief structure 22 can be positioned on either side 24 of the light guide panel 1, specifically at the upper, intermediate, and lower positions of the side 24, or in any of the above positions The first relief structure 22 is placed or disposed in combination.
  • the first uneven structure 22' may be disposed on the projection 21' on at least one side 24 of the light guide plate 1'.
  • the surface of the recess 21 or the projection 21' may be disposed in one example with a corresponding limiting member.
  • the contours of 3 are adapted. In the illustrated example, the grooves 21 or the projections 21' are all curved.
  • the first uneven structure 22" is disposed directly on the side 24 of the light guide plate 1".
  • the limiting member 3 includes at least one second concave-convex structure 32, and the second concave-convex structure 32 and the first concave-convex structure 22 can be matched with each other and can be in a plane with respect to each other in the light guide plate 1 (for example, The plane of the illustrated page is rotated in such a way that the contact state between the first relief structure 22 and the second relief structure 32 that are engaged with each other is switched between the abutting contact and the mutual engagement.
  • the term “coinciding contact” herein means that a part of the first concave-convex structure (for example, a protrusion) and a part of the second uneven structure (for example, a protrusion) are in contact with each other, and restrict movement relative to each other;
  • the term “intermeshing” means that a portion of the first relief structure (eg, a protrusion) and a portion of the second relief structure (eg, a depression between the protrusions) are joined to each other, for example, like two gears meshing with each other. together.
  • the plurality of first relief structures 22 and the second relief structures 32 may be disposed such that they cooperate with each other to achieve positioning of the light guide panel 1 at least in a triangular positioning manner.
  • two first concave-convex structures 22 are provided on the left side of the light guide plate 1, and only one first concave-convex structure 22 is provided on the right side of the light guide plate 1, and finally, a triangle can be realized.
  • the light guide plate 1 is positioned in a positioning manner.
  • two first concave-convex structures 22 may be disposed on the left and right sides of the light guide plate 1 to realize four-point positioning; and so on, more points may be positioned in a similar manner, so that they are no longer tired. Said.
  • first concave-convex structure 22 and the second concave-convex structure 32 are combined is not limited to the one-to-one correspondence shown in the drawings, and may be a first concave-convex structure. 22 is mated with more than one second relief structure 32, or more than one first relief structure 22 is mated with a second relief structure 32.
  • the first concavo-convex structure 22 is provided with one groove 21 and the one first concavo-convex structure 22 and one second concavo-convex structure 32 are matched with each other as an example to illustrate the inventive concept of the present invention, and it is obvious that the present invention is not limited thereto. .
  • the stop member 3 is a gear made of steel or plastic. At this time, the teeth or projections and depressions on the gear constitute the second uneven structure 32.
  • the backlight module of the embodiment further includes an elastic member 5.
  • the elastic member 5 is coupled to the stopper member 3 for restricting or controlling the rotation of the second uneven structure 32 in the plane in which the light guide plate 1 is located.
  • the elastic member 5 of the present embodiment may be a torsion spring or an elastic spring.
  • the elastic member 5 may also be other components known in the art that can function similarly to the torsion spring or the elastic spring described above, and will not be exemplified herein.
  • the backlight module of the present embodiment further includes a connecting member or adhesive 4 between the limiting member 3 and the elastic member 5 for arranging the limiting member 3 on the backboard 1.
  • the adhesive 4 places the limiting member 3 on the backing plate 1.
  • the connecting member 4 of the present embodiment may also be a stud or pin that is inserted into the backing plate 1.
  • the connecting member 4 can also be other components known in the art that can function similarly to the studs or pins described above, and will not be exemplified herein.
  • the limiting member 3 is a gear, and the gear is disposed on the stud or the pin shaft, and rotates in the plane with respect to the first concave-convex structure 22 with the stud or the pin shaft as an axis.
  • the connecting member 4 of the present embodiment can also be fixedly connected or integrally formed with the limiting member 3.
  • the back plate 1 is provided with a through hole 11 (which may also be a groove structure).
  • the connecting member 4 is disposed in the through hole 11.
  • the connecting member 4 is used as an axis.
  • the elastic members 5 are driven to rotate together in the through holes 11.
  • the elastic member 5 can catch the connecting member 4.
  • the elastic member 5 After the second concave-convex structure 32 on the limiting member 3 is pressed by the light guide plate 2, it is necessary to overcome the binding force of the elastic member 5 to drive the elastic member 5 to rotate together. This rotation process winds up the elastic member 5.
  • the light guide plate 2 is reduced in size due to the shrinkage, since the second uneven structure 32 of the stopper member 3 is no longer pressed, the second uneven structure 32 on the stopper member 3 is reversed by the spring of the elastic member 5 Rotate.
  • FIG. 3 there is shown an enlarged view of a region where the light guide plate 2 is in contact with the light guide plate 2 in the unexpanded state.
  • the first state is a state in which the light guide plate 2 is not thermally expanded
  • the first protrusion 23 and the limit of the first concave-convex structure 22 disposed on the surface of the groove 24 on the side 24 of the side 24 are Part 3
  • the first protrusions 33 of the second concave-convex structure 32 correspond to each other, and the limiting member 3 restricts the movement of the light guide plate 2 to the side away from the stopper member 3.
  • FIG. 4 there is shown another enlarged view of a region where the position limiting member 3 and the light guide plate 2 are in contact when the light guide plate 2 is in the second state (the second state is a state in which the light guide plate 2 is thermally expanded).
  • the second concave-convex structure 32 on the stopper member 3 is pressed by the expansion of the light guide plate 2, and the elastic member 5 is disposed at the light guide plate 1
  • the plane in the first direction (for example, the counterclockwise direction shown) is rotated, so that the first concave-convex structure 22 on the light guide plate 2 and the second concave-convex structure 32 of the limiting member 3 are converted into mutual by the protrusion of FIG. Engagement; in the process, the light guide plate 2 is still restrained by the limiting member 3 after being expanded.
  • the three first protrusions 33 on the second relief structure 32 are engaged with the three recesses on the first relief structure 22 adjacent to the first protrusions 23, thereby achieving a better limit. effect.
  • the elastic member 5 acts to drive the second concave-convex structure 32 of the limiting member 3 in the opposite direction to the first direction by virtue of its own elastic force.
  • Rotating in the second direction causes the first protrusions 23 of the first concave-convex structure 22 on the light guide plate 2 to re-correspond to the first protrusions 33 of the second concave-convex structure 32 of the limiting member 3 to recover The limit action in the first state.
  • the relative movement caused by the change of the contact condition of the two concave-convex structures 22, 32 in different states provides an expansion space for the light guide plate 2, so that the limiting member 3 is before or after the expansion of the light guide plate 2. Both of them can effectively serve as a limit, so that the light guide plate 2 can be firmly fixed to the back plate 1 at all times.
  • the groove 21 when the groove 21 is curved and the contour of the inner surface of the groove 21 corresponds to the contour of the limiting member 3, the groove 21 can surround a portion of the limiting member 3 so as to be subtracted. Small overall volume of the device.
  • FIG. 2 is only for the exemplary introduction.
  • the light guide plate 2 does not have to be provided with a recess 21 for each side edge 24 to cooperate with the limiting member 3, for example, the light guide plate 2 is provided with a light source. It is not necessary to provide the groove 21 on the side of the side.
  • an embodiment of the present application further provides another modification of the backlight module. It differs from the above-described example mainly in that the first uneven structure 22' is disposed on the protrusion 21', in which case the first uneven structure is in a state where the light guide plate 1 is in an unheated state (first state).
  • the first protrusion on the 22' is in contact with the first protrusion on the second uneven structure 32; the light guide plate 1 is switched from the first state to the second state due to the expansion (the state in which the light guide plate 1' is thermally expanded)
  • the elastic member 5 of the backlight module is rotated in the first direction, so that the first concave-convex structure 22 ′ and the second concave-convex structure 32 are engaged with each other.
  • the relief structure 22' is disposed on the protrusion 21', and in most cases only the first relief structure 22' A recess adjacent to the first protrusion engages with a first protrusion on the second relief structure 32.
  • the elastic member 5 When the light guide plate 1' is switched from the second state to the first state by the shrinkage, the elastic member 5 is reset to rotate the second concave-convex structure 32 in the second direction, so that the first protrusion of the first concave-convex structure 22' is The first protrusions of the second relief structure 32 re-correspond to the contact.
  • the first direction is selected to be one of a clockwise direction and a counterclockwise direction and the second direction is correspondingly selected as the other of the clockwise direction and the counterclockwise direction.
  • an embodiment of the present application further provides another modification of the backlight module.
  • the difference from the above example is mainly that the first concave-convex structure 22" is directly disposed on the side 24 of the light guide plate 1" instead of being disposed on the groove 21 and the protrusion 21', since its working principle is as shown in FIG.
  • the structural arrangement is roughly the same and will not be described again.
  • the present application further provides a display device including the above backlight module, which may be a mobile phone, a computer, a PAD, or the like. Since the light guide plate 2 of the backlight module can be firmly fixed on the back plate 1, the light guide plate 2 does not shake during the movement of the display device, and the structure is prevented from being damaged.
  • a corresponding concave-convex structure is disposed on the limiting member on the back plate and the side of the light guide plate.
  • the protrusion of the concave-convex structure on the limiting member abuts against the protrusion of the concave-convex structure on the side of the light guide plate, so that the limiting member can restrict the movement of the light guide plate.
  • the concave-convex structure of the limiting member When the light guide plate is thermally expanded, the concave-convex structure of the limiting member is pressed, and the concave-convex structure of the limiting member is rotated relative to the convex-concave structure on the side of the light guide plate, thereby being converted into a fixed by the meshing.
  • the effect of limiting displacement is achieved for the expanded light guide plate.
  • the first concave-convex structure of the limiting member is no longer pressed by the light guide plate, and is reset by the elastic member by the elastic force thereof, and is restored to the two concave-convex structures to be convex.
  • the state of contact with each other Obviously, based on the design of the limit scheme, not only the volume change space can be reserved for the thermal expansion and contraction of the light guide plate, but also the limiting effect on the light guide plate can be maintained at all times.

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

Abstract

一种背光模组及显示装置。背光模组包括背板（1）；导光板（2），设置在背板（1）上并且导光板（2）的至少一个侧边（24）包括至少一个第一凹凸结构（22、22'、22"）；设置在背板（1）上的至少一个限位部件（3），限位部件（3）包括至少一个第二凹凸结构（32），至少一个第二凹凸结构（32）和至少一个第一凹凸结构（22、22'、22"）能够彼此配合并能够相对于彼此在导光板（2）所在的平面内转动，使得彼此配合的第一凹凸结构（22、22'、22"）和第二凹凸结构（32）之间的接触状态在相抵接触和相互啮合之间转换。

Description

背光模组及显示装置
本申请要求于2016年06月21日递交的、申请号为201620610475.7、发明名称为“一种背光模组及显示装置”的中国专利申请的优先权，其全部内容通过引用并入本申请中。
技术领域
本申请涉及显示领域，特别涉及一种背光模组及显示装置。
背景技术
在背光模组中，主要采用导光板将点光源或线光源转化为面光源，可应用于液晶显示器、笔记型电脑、数码相机、监视器以及投影仪等平面显示设备中，用于提供均匀亮度的面光源输出，使平面显示设备能够正常显示影像。
通常，将导光板设置在背板上。然而，在现有技术中，存在无法牢靠固定导光板的问题。
发明内容
本申请的目的之一是提供一种背光模组及显示装置。
根据本申请的一个方面，提供了一种背光模组，包括：
背板；
导光板，设置在所述背板上并且所述导光板的至少一个侧边包括至少一个第一凹凸结构；
设置在所述背板上的至少一个限位部件，所述限位部件包括至少一个第二凹凸结构，所述至少一个第二凹凸结构和所述至少一个第一凹凸结构能够彼此配合并能够相对于彼此在导光板所在的平面内转动，使得彼此配合的第一凹凸结构和第二凹凸结构之间的接触状态在相抵接触和相互啮合之间转换。
在一个示例中，所述背光模组还包括在导光板的至少一侧边上的凹槽或凸起，并且所述第一凹凸结构对应地设置在所述凹槽或凸起上。
在一个示例中，所述凹槽或凸起的表面与对应的限位部件的轮廓相适应。
在一个示例中，所述凹槽或凸起呈弧形。
在一个示例中，所述至少一个第一凹凸结构直接设置在导光板的侧边上。
在一个示例中，所述背光模组包括多个彼此配合的第一凹凸结构和第二凹凸结构使得至少以三角定位的方式对导光板进行定位。
在一个示例中，所述至少一个第一凹凸结构中的一个第一凹凸结构与所述至少一个第二凹凸结构中的一个第二凹凸结构彼此配合；
所述至少一个第一凹凸结构中的一个第一凹凸结构与所述至少一个第二凹凸结构中的多于一个第二凹凸结构彼此配合；或
所述至少一个第一凹凸结构中的多于一个第一凹凸结构与所述至少一个第二凹凸结构中的一个第二凹凸结构彼此配合。
在一个示例中，所述第一凹凸结构定位在导光板的任一侧边的上部位置、中间位置或下部位置上以及以上述位置的任何组合放置。
在一个示例中，所述背光模组还包括与所述限位部件连接的弹性部件，用于控制所述第二凹凸结构的转动。
在一个示例中，所述弹性部件包括扭簧或弹性发条。
在一个示例中，所述导光板具有第一状态和第二状态，所述第一状态为导光板未受热膨胀的状态，第二状态为导光板受热膨胀的状态；
在所述导光板处于第一状态时，所述第一凹凸结构上的第一凸起与所述第二凹凸结构的第一凸起对应相抵接触；
在所述导光板因膨胀从第一状态转换为第二状态时，所述第二凹凸结构受所述导光板挤压后克服背光模组的弹性部件沿第一方向转动，从而使得所述第一凹凸结构与所述第二凹凸结构相互啮合；
在所述导光板因冷缩从第二状态转换为第一状态时，所述弹性部件复位带动所述第二凹凸结构沿第二方向转动，使所述第一凹凸结构的第一凸起与所述第二凹凸结构的第一凸起重新对应相抵接触，
其中，第一方向被选择为顺时针方向和逆时针方向中的一个而第二方向被相应地选择为顺时针方向和逆时针方向中的另一个。
在一个示例中，所述限位部件为齿轮。
在一个示例中，所述齿轮由钢或塑料制成。
在一个示例中，所述背光模组还包括位于限位部件和弹性部件之间的连接部件或粘结剂，所述连接部件或粘结剂将所述限位部件设置在所述背板上。
在一个示例中，所述连接部件包括所述限位部件固定连接或者一体成型的螺柱 或销轴。
在一个示例中，所述背板设置有通孔或槽，所述连接部件设置在所述通孔或槽内，所述第二凹凸结构在受所述导光板挤压后，以所述连接部件为轴，相对于第一凹凸结构在背光板所在的平面内转动。
根据本申请的第二方面，提供了一种显示装置，包括如上所述的背光模组。
附图说明
图1为本申请的一个实施例提供的背光模组的结构示意图；
图2为本申请的另一个实施例提供的背光模组的结构示意图；
图3为图2的导光板在未膨胀状态下其侧边与限位部件的相对位置关系示意图；
图4为图2的导光板在膨胀状态下其侧边与限位部件的相对位置关系示意图；
图5为图2的限位部件与连接部件的结构示意；
图6为本申请的背光模组的另一变形例的结构示意图；
图7为本申请的背光模组的另一变形例的结构示意图。
具体实施方式
为使本申请要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
如图1所示，在该背光源结构中，导光板2设置在背板1上，导光板2与背板1相接触的一面设置有凹槽用于与背板固定卡合，由于背光源的热量会使导光板2在水平方向上膨胀，凹槽需要为膨胀留有一定的余量空间(由图1中的附图标记GAP示出)。
采用该结构设计，背光源在未受热的情况下，与背板固定并不牢靠，很容易在搬动过程中发生晃动，造成结构损伤。相比，在受热的情况下，随着导光板尺寸发生变化，导光板与背板的固定变得相对牢固一些。
然而，在一些情况下，期望能够始终牢靠固定导光板，又能为导光板留有膨胀空间。
参考图2，本申请的另一实施例提供一种背光模组，包括：背板1、设置在背板1上的导光板2以及设置在背板1上的至少一个限位部件3。
导光板2至少一个侧边24包括至少一个第一凹凸结构22。在本示例中，在导光 板1的至少一侧上还设置有至少一个凹槽21。第一凹凸结构22对应地设置在导光板1的凹槽21上，例如凹槽21的表面上。在图2中示出了在导光板1的左右两侧的上端和下端均设置有两个凹槽21和两个第一凹凸结构22。本领域技术人员可以明白，凹槽21和第一凹凸结构22的数量不受此限制，可以根据实际需要设置它们的数量和位置。
例如，在一个示例中，第一凹凸结构22可以定位在导光板1的任一侧边24上，具体地在该侧边24的上部位置、中间位置和下部位置上，或者以上述位置的任何组合放置或设置第一凹凸结构22。
同样，如图6所示，第一凹凸结构22’还可以设置在导光板1’的至少一个侧边24上的凸起21’上。不论是将第一凹凸结构22、22’设置在凹槽21上还是设置在凸起21’上，可以在一个示例中将凹槽21或凸起21’的表面设置成与对应的限位部件3的轮廓相适应。在图示的示例中，凹槽21或凸起21’都呈现弧形。
如图7所示，第一凹凸结构22”直接设置在导光板1”的侧边24上。
在本实施例中，该限位部件3包括至少一个第二凹凸结构32，该第二凹凸结构32和第一凹凸结构22能够彼此配合并能够相对于彼此在导光板1所在的平面(例如图示的页面的平面)内转动，使得彼此配合的第一凹凸结构22和第二凹凸结构32之间的接触状态在相抵接触和相互啮合之间转换。
需要说明的是，此处的术语“相抵接触”是指第一凹凸结构的一部分(例如凸起)与第二凹凸结构的一部分(例如凸起)相互接触在一起，并且限制相对彼此的移动；而术语“相互啮合”是指第一凹凸结构的一部分(例如凸起)与第二凹凸结构的一部分(例如凸起之间的凹陷)相互接合在一起，例如就像两个齿轮一样彼此啮合在一起。
在一个示例中，可以设置多个第一凹凸结构22和第二凹凸结构32使得它们彼此配合，以实现至少以三角定位的方式对导光板1进行定位。例如，在图2所示的示例中，在导光板1的左侧设置2个第一凹凸结构22而在导光板1的右侧仅设置1个第一凹凸结构22，最终将可以实现以三角定位的方式对导光板1进行定位。当然，也可以在导光板1的左右两侧均设置两个第一凹凸结构22，从而实现四点定位；以此类推，可以以类似的方式实现更多点的定位，故不再一一累述。
可以理解，本领域技术人员还可以根据需要在每个凹槽21内设置多于一个的限位部件3，例如两个、三个或更多个限位部件3。也就是说，第一凹凸结构22和第二凹凸结构32的配合方式不限于图示的一一对应的关系，也可以是一个第一凹凸结构 22与多于一个第二凹凸结构32配合，或者是多于一个第一凹凸结构22与一个第二凹凸结构32配合。
在下文仅以一个凹槽21设置一个第一凹凸结构22并且该一个第一凹凸结构22与一个第二凹凸结构32彼此配合的方式为例来说明本发明的发明构思，显然本发明不限于此。
在一个示例中，限位部件3为齿轮，该齿轮由钢或塑料制成。此时，齿轮上的齿或凸起、凹陷构成了第二凹凸结构32。
参考图5，本实施例的背光模组还包括弹性部件5。弹性部件5与限位部件3连接，用于限制或控制第二凹凸结构32在导光板1所在的平面内的转动。
在实际应用中，本实施例的弹性部件5可以是扭簧或弹性发条。当然，该弹性部件5还可以是能够起到与上述的扭簧或弹性发条类似的功能的本领域中已知的其他部件，在此不再例举。
具体地，本实施例的背光模组还包括位于限位部件3和弹性部件5之间的连接部件或粘接剂4，用于将限位部件3设置在背板1上。
在一个例子中，所述粘接剂4将限位部件3设置在背板1上。
在另一示例中，本实施例的连接部件4还可以是插入到背板1中的螺柱或销轴。当然，该连接部件4还可以是能够起到与上述螺柱或销轴类似功能的本领域中已知的其他部件，在此不再例举。对应地，限位部件3为齿轮，齿轮设置在螺柱或销轴上，并以该螺柱或销轴为轴，相对于第一凹凸结构22在所述平面内转动。
本实施例的连接部件4还可以与限位部件3固定连接或者一体成型。背板1设置有通孔11(也可以是槽结构)，连接部件4设置在该通孔11内，当第二凹凸结构32在受导光板2挤压后，以连接部件4为轴，能够带动弹性部件5在通孔11内一起转动。
以弹性部件5为弹性发条、连接部件4为例，弹性部件5可以卡住连接部件4。当限位部件3上的第二凹凸结构32受到导光板2挤压后，需要克服弹性部件5的约束力后才能带动弹性部件5一起转动。该转动过程即对弹性部件5进行上条。当导光板2因冷缩体积减小后，由于限位部件3的第二凹凸结构32不再受到挤压，限位部件3上的第二凹凸结构32通过弹性部件5的发条复位进行反向旋转。
参考图3所示，其示出了导光板2在未膨胀状态下限位部件3与导光板2接触区域的放大图。在导光板2处于第一状态时(该第一状态为导光板2未受热膨胀的状态)，其侧边24凹槽21表面上设置的第一凹凸结构22的第一凸起23与限位部件3 的第二凹凸结构32的第一凸起33对应相抵，限位部件3限制导光板2向远离限位部件3的一侧移动。
参考图4，其示出在导光板2处于第二状态时(该第二状态为导光板2受热膨胀的状态)限位部件3与导光板2接触区域的另一放大图。在导光板2因膨胀从第一状态转换为第二状态时，限位部件3上的第二凹凸结构32受到导光板2膨胀后的挤压，并克服弹性部件5在所述导光板1所在的平面内沿第一方向(例如图示的逆时针方向)转动，使得导光板2上的第一凹凸结构22与限位部件3的第二凹凸结构32由图3的凸起相抵转换为相互啮合；该过程中，导光板2膨胀后也依然受到限位部件3的限位作用。在图4的示例中，第二凹凸结构32上的三个第一凸起33与第一凹凸结构22上的与第一凸起23相邻的三个凹陷啮合，从而实现较好的限位作用。
在导光板2因冷缩从第二状态返回或转换为第一状态时，弹性部件5借助于其自身的弹性力作用，带动限位部件3的第二凹凸结构32沿与第一方向相反的第二方向(例如顺时针方向)转动，使导光板2上的第一凹凸结构22的第一凸起23重新与限位部件3的第二凹凸结构32的第一凸起33对应相抵，恢复第一状态下的限位作用。
由此可见，本实施例通过两个凹凸结构22、32在不同状态下接触情况变化产生的相对运动，为导光板2提供了膨胀空间，使得限位部件3在导光板2膨胀前或膨胀后均能够有效地起到限位作用，这样导光板2能够时刻牢靠地固定在背板1上。
具体地，参考图2所示，在凹槽21呈弧形，且凹槽21内表面的轮廓与限位部件3的轮廓相对应时，凹槽21能够包围限位部件3的一部分，以便减小整个装置的体积。
请注意到，图2仅用于示例性介绍，在实际应用中，导光板2并不是每个侧边24都必需设置凹槽21来与限位部件3配合，例如导光板2上设置有光源的侧边不需要设置凹槽21。
再次参见图6，本申请的实施例还提供了背光模组的另一变形例。其与上述的示例的区别主要在于第一凹凸结构22’设置在凸起21’上，在这种情况下，在导光板1处于未受热膨胀的状态(第一状态)下，第一凹凸结构22’上的第一凸起与第二凹凸结构32上的第一凸起对应相抵接触；在导光板1因膨胀从第一状态转换为第二状态(为导光板1’受热膨胀的状态)时，所述第二凹凸结构32受导光板1挤压后克服背光模组的弹性部件5沿第一方向转动，从而使得第一凹凸结构22’与第二凹凸结构32相互啮合，由于第一凹凸结构22’设置在凸起21’上，多数情况下仅第一凹凸结构22’ 的第一凸起相邻的一个凹陷与第二凹凸结构32上的一个第一凸起实现啮合。
在导光板1’因冷缩从第二状态转换为第一状态时，弹性部件5复位带动第二凹凸结构32沿第二方向转动，使所述第一凹凸结构22’的第一凸起与所述第二凹凸结构32的第一凸起重新对应相抵接触。
第一方向被选择为顺时针方向和逆时针方向中的一个而第二方向被相应地选择为顺时针方向和逆时针方向中的另一个。
参见图7，本申请的实施例还提供了背光模组的又一变形例。其与上述的示例的区别主要在于第一凹凸结构22”直接设置在导光板1”的侧边24上而不是设置在凹槽21和凸起21’上，由于其工作原理与图6所示的结构布置大致相同，故不再累述。
此外，本申请还提供一种包括有上述背光模组的显示装置，该显示装置可以是手机、电脑、PAD等设备。由于上述背光模组的导光板2能够牢固地固定在背板1上，因此在显示装置移动过程中，导光板2不会发生晃动，避免结构出现损伤。
在本申请中，在背板上的限位部件以及导光板侧边上均设置对应的凹凸结构。在导光板处于第一状态或未膨胀的状态下，限位部件上的凹凸结构的凸起与导光板侧边上的凹凸结构的凸起相抵接触，使限位部件能够限制导光板发生移动。当导光板受热膨胀后，会对限位部件的凹凸结构进行挤压，使限位部件的凹凸结构相对导光板侧边的凸凹结构发生旋转，从而转换为通过啮合固定，此时限位部件依能够对膨胀后的导光板实现限制位移的作用。在导光板由于冷缩返回到第一状态时，限位部件的第一凹凸结构不再受到导光板挤压，并由弹性部件通过其弹性力的作用复位，重新恢复到两个凹凸结构以凸起相抵接触的状态。显然，基于该限位方案的设计，不仅可以给导光板热胀冷缩预留了体积变化的空间，还能一直保持对导光板的限制作用。
虽然本发明总体构思的一些实施例已被示出和说明，本领域普通技术人员将理解，在不背离本总体发明构思的原则和精神的情况下，可对这些实施例做出改变，本发明的范围以权利要求和它们的等同物限定。

Claims (17)

  1. 一种背光模组，包括：
    背板；
    导光板，设置在所述背板上并且所述导光板的至少一个侧边包括至少一个第一凹凸结构；
    设置在所述背板上的至少一个限位部件，所述限位部件包括至少一个第二凹凸结构，所述至少一个第二凹凸结构和所述至少一个第一凹凸结构能够彼此配合并能够相对于彼此在导光板所在的平面内转动，使得彼此配合的第一凹凸结构和第二凹凸结构之间的接触状态在相抵接触和相互啮合之间转换。
  2. 根据权利要求1所述的背光模组，还包括在导光板的至少一侧边上的凹槽或凸起，并且所述第一凹凸结构对应地设置在所述凹槽或凸起上。
  3. 根据权利要求2所述的背光模组，其中，
    所述凹槽或凸起的表面与对应的限位部件的轮廓相适应。
  4. 根据权利要求3所述的背光模组，其中，
    所述凹槽或凸起呈弧形。
  5. 根据权利要求1所述的背光模组，其中，
    所述至少一个第一凹凸结构直接设置在导光板的侧边上。
  6. 根据权利要求1-5中任一项所述的背光模组，其中，
    所述背光模组包括多个彼此配合的第一凹凸结构和第二凹凸结构使得至少以三角定位的方式对导光板进行定位。
  7. 根据权利要求1-6中任一项所述的背光模组，其中，
    所述至少一个第一凹凸结构中的一个第一凹凸结构与所述至少一个第二凹凸结构中的一个第二凹凸结构彼此配合；
    所述至少一个第一凹凸结构中的一个第一凹凸结构与所述至少一个第二凹凸结构中的多于一个第二凹凸结构彼此配合；或
    所述至少一个第一凹凸结构中的多于一个第一凹凸结构与所述至少一个第二凹凸结构中的一个第二凹凸结构彼此配合。
  8. 根据权利要求1-7中任一项所述的背光模组，其中，
    所述第一凹凸结构定位在导光板的任一侧边的上部位置、中间位置或下部位置上以及以上述位置的任何组合放置。
  9. 根据权利要求1-8中任一项所述的背光模组，其中，
    所述背光模组还包括与所述限位部件连接的弹性部件，用于控制所述第二凹凸结构的转动。
  10. 根据权利要求9所述的背光模组，其中，
    所述弹性部件包括扭簧或弹性发条。
  11. 根据权利要求9或10所述的背光模组，其中，
    所述导光板具有第一状态和第二状态，所述第一状态为导光板未受热膨胀的状态，第二状态为导光板受热膨胀的状态；
    在所述导光板处于第一状态时，所述第一凹凸结构上的第一凸起与所述第二凹凸结构的第一凸起对应相抵接触；
    在所述导光板因膨胀从第一状态转换为第二状态时，所述第二凹凸结构受所述导光板挤压后克服背光模组的弹性部件沿第一方向转动，从而使得所述第一凹凸结构与所述第二凹凸结构相互啮合；
    在所述导光板因冷缩从第二状态转换为第一状态时，所述弹性部件复位带动所述第二凹凸结构沿第二方向转动，使所述第一凹凸结构的第一凸起与所述第二凹凸结构的第一凸起重新对应相抵接触，
    其中，第一方向被选择为顺时针方向和逆时针方向中的一个而第二方向被相应地选择为顺时针方向和逆时针方向中的另一个。
  12. 根据权利要求1-11中任一项所述的背光模组，其中，
    所述限位部件为齿轮。
  13. 根据权利要求12所述的背光模组，其中，
    所述齿轮由钢或塑料制成。
  14. 根据权利要求9-13中任一项所述的背光模组，还包括位于限位部件和弹性部件之间的连接部件或粘结剂，所述连接部件或粘结剂将所述限位部件设置在所述背板上。
  15. 根据权利要求14所述的背光模组，其中，
    所述连接部件包括所述限位部件固定连接或者一体成型的螺柱或销轴。
  16. 根据权利要求14或15所述的背光模组，其中，
    所述背板设置有通孔或槽，所述连接部件设置在所述通孔或槽内，所述第二凹凸结构在受所述导光板挤压后，以所述连接部件为轴，相对于第一凹凸结构在背光板所在的平面内转动。
  17. 一种显示装置，包括如权利要求1-16中任一项所述的背光模组。
PCT/CN2017/077871 2016-06-21 2017-03-23 背光模组及显示装置 WO2017219724A1 (zh)

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