WO2019184369A1 - 背光模组和显示装置 - Google Patents

背光模组和显示装置 Download PDF

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Publication number
WO2019184369A1
WO2019184369A1 PCT/CN2018/114539 CN2018114539W WO2019184369A1 WO 2019184369 A1 WO2019184369 A1 WO 2019184369A1 CN 2018114539 W CN2018114539 W CN 2018114539W WO 2019184369 A1 WO2019184369 A1 WO 2019184369A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
thermal
heat
heat dissipating
disposed
Prior art date
Application number
PCT/CN2018/114539
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English (en)
French (fr)
Inventor
马永达
乔勇
吴新银
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/337,305 priority Critical patent/US11067742B2/en
Publication of WO2019184369A1 publication Critical patent/WO2019184369A1/zh

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    • 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
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • the illumination effect of the backlight module will directly affect the display effect of the liquid crystal display.
  • a backlight module includes: a heat dissipating member on a back plate for dissipating heat generated by a light source; and a reflecting member disposed on a side of the light guide plate adjacent to the back plate; And a thermal buffer member disposed between the heat dissipating member and the reflective member, wherein a thermal conductivity of the thermal buffer member in a direction perpendicular to a light emitting surface of the backlight module is smaller than the heat dissipating member The thermal conductivity in a direction perpendicular to the light emitting surface of the backlight module.
  • a thermal buffer of the plurality of thermal buffers adjacent to the light source has a thermal conductivity in a direction perpendicular to a light exit surface of the backlight module that is smaller than a thermal buffer away from the light source. The thermal conductivity of the backlight module in the direction of the light exit surface.
  • the heat sink is not in direct contact with the reflector.
  • the heat sink has a first heat dissipation groove adjacent to the first surface of the reflector, and at least one of the one or more heat buffer members is disposed in the first heat dissipation groove.
  • the heat dissipating member has a first heat dissipating recess adjacent to the first surface of the reflective member, and the one or more thermal buffer members are disposed on the first surface except the first heat dissipating recess An area other than the reflector.
  • the heat dissipating member has a second heat dissipating groove away from the second surface of the reflecting member.
  • the thermal buffer comprises a thermal barrier coating.
  • a thermal conductive tape is disposed between at least one of the backing plate and the light source and the heat sink.
  • the backing plate includes a body and a bend disposed at an end of the body, the body and the bend defining a space in which the heat sink is received.
  • a display device comprising: the backlight module of any one of the above embodiments.
  • a method for manufacturing a backlight module includes: disposing a heat dissipating member on a back plate, the heat dissipating member is configured to dissipate heat generated by the light source; and the heat dissipating member is away from the
  • One or more thermal buffering members are disposed on one side of the backing plate, and a thermal conductivity of the thermal buffering member in a direction perpendicular to a light emitting surface of the backlight module is smaller than a light emitting surface of the heat dissipating component perpendicular to the backlight module a thermal conductivity in a direction; and a reflective member disposed on a side of the one or more thermal buffers away from the heat sink.
  • a thermal buffer of the plurality of thermal buffers adjacent to the light source has a thermal conductivity in a direction perpendicular to a light exit surface of the backlight module that is smaller than a thermal buffer away from the light source. The thermal conductivity of the backlight module in the direction of the light exit surface.
  • the heat sink is not in direct contact with the reflector.
  • the heat sink has a first heat dissipation groove adjacent to the first surface of the reflector, and at least one of the one or more heat buffer members is disposed in the first heat dissipation groove.
  • the heat dissipating member has a first heat dissipating recess adjacent to the first surface of the reflective member, and the one or more thermal buffer members are disposed on the first surface except the first heat dissipating recess An area other than the reflector.
  • the heat dissipating member has a second heat dissipating groove away from the second surface of the reflecting member.
  • the thermal buffer comprises a thermal barrier coating.
  • a thermal conductive tape is disposed between at least one of the backing plate and the light source and the heat sink.
  • the backing plate includes a body and a bend disposed at an end of the body, the body and the bend defining a space in which the heat sink is received.
  • FIG. 1 is a schematic structural view of a backlight module according to some embodiments of the present disclosure
  • FIG. 2 is a schematic structural diagram of a backlight module according to other embodiments of the present disclosure.
  • FIG. 3 is a schematic structural diagram of a backlight module according to some embodiments of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a display device according to some embodiments of the present disclosure.
  • FIG. 5 is a flow diagram of a method of fabricating a backlight module in accordance with some embodiments of the present disclosure.
  • a particular component when it is described that a particular component is located between the first component and the second component, there may be intervening components between the particular component and the first component or the second component, or there may be no intervening components.
  • that particular component when it is described that a particular component is connected to other components, that particular component can be directly connected to the other component without the intervening component, or can be directly connected to the other component without having the intervening component.
  • the inventors have noticed that in the related art, the light emitted by the backlight module is not uniform. After further analysis, the inventors found that the heat sink in the backlight module is in direct contact with the reflector under the light guide plate, and there is no other component between them. This causes the heat of the heat sink to be directly transmitted to the reflector, resulting in irregular deformation of the reflector, resulting in uneven light emitted by the backlight module.
  • FIG. 1 is a schematic structural view of a backlight module according to some embodiments of the present disclosure.
  • the backlight module may include a heat sink 101 , a reflector 102 , and one or more thermal buffers 103 . It should be understood that the backlight module may also include components such as optical films, frames, and the like that are not shown in FIG.
  • the heat sink 101 is located on the backing plate 104 for dissipating heat generated by the light source 105.
  • the heat sink 101 can be a heat sink.
  • the present disclosure is not limited to this.
  • the backing plate 104 can include a body and a bend disposed at an end of the body, the body and the bend defining a space in which the heat sink 101 can be received.
  • a structure can reduce the thickness of the backlight module.
  • the body can be a horizontal portion of the backing plate 104
  • the bent portion can be a vertical portion of the backing plate 104
  • the horizontal portion and the vertical portion can define a space similar to the groove.
  • a thermal conductive tape 107 may be disposed between the backing plate 104 and the heat sink 101. The arrangement of the thermal conductive tape 107 facilitates the fixing of the heat sink 101 on the one hand and the heat dissipation of the heat sink 101 on the other hand.
  • the light source 105 may be an edge-lit light source disposed at a side of the light guide plate 106.
  • the light source 105 can include, but is not limited to, an LED (Light Emitting Diode) light strip or the like.
  • a thermal conductive tape 107 is disposed between the light source 105 and the heat sink 101. The arrangement of the thermal conductive tape 107 facilitates the fixing of the light source 105 on the one hand and the heat dissipation of the heat sink 101 on the other hand.
  • the reflector 102 is disposed on a side of the light guide plate 106 near the back plate 101.
  • the reflecting member 102 can reflect the light emitted from the light guide plate 106 into the light guide plate 106 to improve light utilization.
  • the reflective member 102 can be a reflective sheet.
  • the heat buffer member 103 is disposed between the heat sink 101 and the reflector 102.
  • the thermal conductivity of the thermal buffer member 103 in a direction perpendicular to the light emitting surface of the backlight module is smaller than the thermal conductivity of the heat dissipating member 101 in a direction perpendicular to the light emitting surface of the backlight module.
  • the material of the thermal buffer may include, for example, a composite magnesium aluminum silicate thermal barrier coating, a rare earth thermal insulation coating, and the like.
  • the direction perpendicular to the light exit surface of the backlight module can also be understood as the direction perpendicular to the light exit surface of the light guide plate 106 (the upper surface of the light guide plate 106 shown in FIG. 1).
  • a thermal buffer is disposed between the heat sink and the reflector, so that at least part of the heat of the heat sink is transmitted to the reflector after passing through the heat buffer. Since the thermal conductivity of the thermal buffer in a direction perpendicular to the light emitting surface of the backlight module is smaller than the thermal conductivity of the heat sink in a direction perpendicular to the light emitting surface of the backlight module, the heat obtained by the reflecting member from the heat sink can be reduced. The small reflecting member is deformed by heat, thereby improving the uniformity of light emitted by the backlight module.
  • heat sink 101 illustrated in FIG. 1 has a recess on a side adjacent to the reflector 102, this is merely illustrative and is not intended to limit the disclosure.
  • the backlight module includes a plurality of thermal buffers 103.
  • the thermal buffers 103 of the plurality of thermal buffers 103 adjacent to the light source 105 have a thermal conductivity that is less than the distance from the light source 105 in a direction perpendicular to the light emitting surface of the backlight module.
  • the thermal buffer member 103 has a thermal conductivity in a direction perpendicular to the light emitting surface of the backlight module.
  • FIGS. 2 and 3 A backlight module according to further embodiments of the present disclosure will be described below with reference to FIGS. 2 and 3. It should be noted that, in the following description, only the differences of the backlight modules shown in FIG. 2, FIG. 3 and FIG. 1 are mainly emphasized, and other similar or similar points can be referred to the above description.
  • FIG. 2 is a schematic structural view of a backlight module according to other embodiments of the present disclosure.
  • the heat sink 101 has a first face 111 adjacent to the reflector 102 and a second face 121 opposite the first face 111 away from the reflector 102.
  • the first face 111 of the heat sink 101 has a first heat dissipation groove 1011.
  • At least one of the one or more thermal buffers 103 is disposed in the first heat dissipation groove 1011.
  • a portion of the thermal buffering member 103 may be disposed in the first heat dissipating recess 1011, and the other thermal buffering members 103 may be disposed in a region of the first surface 111 other than the first heat dissipating recess 1011 and the reflective member 102. Between, as shown in Figure 2. In other implementations, all of the thermal buffers 103 can be disposed in the first heat dissipation recess 1011.
  • At least one thermal buffer is disposed in the first heat dissipation groove.
  • the thickness of the thermal buffer member disposed in the first heat dissipation groove may be set to be thick. This results in less heat transfer to the reflector, which further improves the uniformity of light emitted by the backlight module.
  • the heat sink 101 is not in direct contact with the reflector 102. In this case, any position of the heat dissipating member 101 is not in direct contact with the reflecting member 102, so that the heat transferred to the reflecting member 102 can be further reduced, thereby further improving the uniformity of light emitted by the backlight module.
  • the thermal buffering member 103 is in direct contact with the reflecting member 102 and functions to support the reflecting member 102.
  • FIG. 3 is a schematic structural diagram of a backlight module according to some embodiments of the present disclosure.
  • the heat sink 101 has a first face 111 adjacent to the reflector 102 and a second face 121 opposite the first face 111 away from the reflector 102.
  • the first face 111 of the heat sink 101 has a first heat dissipation groove 1011.
  • One or more thermal buffers 103 are disposed between the region of the first face 111 other than the first heat dissipation recess 1011 and the reflective member 102.
  • the thermal bumper 103 can include a thermal barrier coating.
  • the heat-insulating coating layer can be integrally formed with the heat dissipating member 101, thereby facilitating maintaining the flatness of the bottom reflecting member 102 and reducing the deformation of the bottom reflecting sheet 102, thereby further improving the uniformity of light emitted by the backlight module.
  • the second surface 121 of the heat dissipating member 101 away from the reflecting member 102 may have a second heat dissipating groove (not shown). Thereby, the dissipation of heat of the heat sink 101 is facilitated.
  • the display device 400 may include the backlight module 401 of any of the above embodiments.
  • the display device 400 may include, for example, a display panel, a mobile terminal, a television, a display, a notebook computer, a digital photo frame, a navigator, an electronic paper, or the like, any product or component having a display function.
  • FIG. 5 is a flow diagram of a method of fabricating a backlight module in accordance with some embodiments of the present disclosure.
  • a heat sink is disposed on the backing plate for dissipating heat generated by the light source.
  • the heat sink can be a heat sink.
  • the light source can be an LED light strip.
  • one or more thermal buffers are disposed on a side of the heat sink remote from the backing plate.
  • the thermal conductivity of the thermal buffer in a direction perpendicular to the light emitting surface of the backlight module is smaller than the thermal conductivity of the heat sink in a direction perpendicular to the light emitting surface of the backlight module.
  • a reflector is disposed on one side of the one or more thermal buffers away from the heat sink.
  • a light guide plate may also be disposed on the reflecting member after the reflecting member is formed. Further, an optical film or the like can be provided on the light guide plate.
  • a thermal buffer is disposed between the heat sink and the reflector, such that at least a portion of the heat of the heat sink passes through the heat buffer before being transmitted to the reflector. Since the thermal conductivity of the thermal buffer in the direction perpendicular to the light emitting surface of the backlight module is smaller than the thermal conductivity of the heat sink in a direction perpendicular to the light emitting surface of the backlight module, the heat obtained by the reflecting member from the heat sink can be reduced. The small reflecting member is deformed by heat, thereby improving the uniformity of light emitted by the backlight module.

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

Abstract

本公开提供了一种背光模组和显示装置，涉及显示技术领域。背光模组包括：位于背板上的散热件，用于消散光源产生的热量；反射件，设置在导光板靠近所述背板的一侧；以及一个或多个热缓冲件，设置在所述散热件与所述反射件之间，所述热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于所述散热件在垂直于所述背光模组出光面的方向上的导热系数。

Description

背光模组和显示装置
相关申请的交叉引用
本申请是以CN申请号为201820437351.2，申请日为2018年3月29日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及背光模组和显示装置。
背景技术
随着液晶显示技术的不断发展，背光源产业也不断发展。作为液晶显示器的关键零组件之一，背光模组的发光效果将直接影响到液晶显示器的显示效果。
发明内容
根据本公开实施例的一方面，提供一种背光模组，包括：位于背板上的散热件，用于消散光源产生的热量；反射件，设置在导光板靠近所述背板的一侧；以及一个或多个热缓冲件，设置在所述散热件与所述反射件之间，所述热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于所述散热件在垂直于所述背光模组出光面的方向上的导热系数。
在一些实施例中，所述多个热缓冲件中靠近所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于远离所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数。
在一些实施例中，所述散热件与所述反射件不直接接触。
在一些实施例中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件中的至少一个设置在所述第一散热凹槽中。
在一些实施例中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件设置在所述第一面除所述第一散热凹槽之外的区域与所述反射件之间。
在一些实施例中，所述散热件远离所述反射件的第二面具有第二散热凹槽。
在一些实施例中，所述热缓冲件包括隔热涂层。
在一些实施例中，所述背板和所述光源中的至少一个与所述散热件之间设置有导热胶带。
在一些实施例中，所述背板包括本体和设置在所述本体的端部的弯折部，所述本体和所述弯折部限定容纳所述散热件的空间。
根据本公开实施例的另一方面，提供一种显示装置，包括：上述任意一个实施例所述的背光模组。
根据本公开实施例的又一方面，提供一种背光模组的制造方法，包括：在背板上设置散热件，所述散热件用于消散光源产生的热量；在所述散热件远离所述背板的一侧设置一个或多个热缓冲件，所述热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于所述散热件在垂直于所述背光模组出光面的方向上的导热系数；以及在所述一个或多个热缓冲件远离所述散热件的一侧设置反射件。
在一些实施例中，所述多个热缓冲件中靠近所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于远离所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数。
在一些实施例中，所述散热件与所述反射件不直接接触。
在一些实施例中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件中的至少一个设置在所述第一散热凹槽中。
在一些实施例中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件设置在所述第一面除所述第一散热凹槽之外的区域与所述反射件之间。
在一些实施例中，所述散热件远离所述反射件的第二面具有第二散热凹槽。
在一些实施例中，所述热缓冲件包括隔热涂层。
在一些实施例中，所述背板和所述光源中的至少一个与所述散热件之间设置有导热胶带。
在一些实施例中，所述背板包括本体和设置在所述本体的端部的弯折部，所述本体和所述弯折部限定容纳所述散热件的空间。
附图说明
构成说明书的一部分的附图描述了本公开的实施例，并且连同说明书一起用于解释本公开的原理。
参照附图，根据下面的详细描述，可以更加清楚地理解本公开，其中：
图1是根据本公开一些实施例的背光模组的结构示意图；
图2是根据本公开另一些实施例的背光模组的结构示意图；
图3是根据本公开又一些实施例的背光模组的结构示意图；
图4是根据本公开一些实施例的显示装置的结构示意图；
图5是根据本公开一些实施例的背光模组的制造方法的流程示意图。
应当明白，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。此外，相同或类似的参考标号表示相同或类似的构件。
具体实施方式
现在将参照附图来详细描述本公开的各种示例性实施例。对示例性实施例的描述仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。本公开可以以许多不同的形式实现，不限于这里所述的实施例。提供这些实施例是为了使本公开透彻且完整，并且向本领域技术人员充分表达本公开的范围。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置应被解释为仅仅是示例性的，而不是作为限制。
现在将参照附图来详细描述本公开的各种示例性实施例。对示例性实施例的描述仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。本公开可以以许多不同的形式实现，不限于这里所述的实施例。提供这些实施例是为了使本公开透彻且完整，并且向本领域技术人员充分表达本公开的范围。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、材料的组分和数值应被解释为仅仅是示例性的，而不是作为限制。
本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的部分。“包括”或者“包含”等类似的词语意指在该词前的要素涵盖在该词后列举的要素，并不排除也涵盖其他要素的可能。“上”、“下”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
在本公开中，当描述到特定部件位于第一部件和第二部件之间时，在该特定部件与第一部件或第二部件之间可以存在居间部件，也可以不存在居间部件。当描述到特定部件连接其它部件时，该特定部件可以与所述其它部件直接连接而不具有居间部 件，也可以不与所述其它部件直接连接而具有居间部件。
本公开使用的所有术语(包括技术术语或者科学术语)与本公开所属领域的普通技术人员理解的含义相同，除非另外特别定义。还应当理解，在诸如通用字典中定义的术语应当被解释为具有与它们在相关技术的上下文中的含义相一致的含义，而不应用理想化或极度形式化的意义来解释，除非这里明确地这样定义。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
发明人注意到，相关技术中，背光模组发出的光不均匀。通过进一步分析后，发明人发现，背光模组中的散热件与导光板下方的反射件是直接接触的，二者之间没有其他部件。这使得散热件的热量会被直接传递至反射件，导致反射件的不规则变形，从而导致背光模组发出的光不均匀。
为了解决上述问题，本公开实施例提供了如下技术方案。
图1是根据本公开一些实施例的背光模组的结构示意图。
如图1所示，背光模组可以包括散热件101、反射件102、以及一个或多个热缓冲件103。应理解，背光模组还可以包括图1中并未示出的光学膜片、框架等部件。
散热件101位于背板104上，用于消散光源105产生的热量。在一些实施例中，散热件101可以是散热片。然而，本公开并不限于此。
在一些实施例中，背板104可以包括本体和设置在本体的端部的弯折部，本体和弯折部可以限定容纳散热件101的空间。这样的结构可以减小背光模组的厚度。例如，参见图1，本体可以是背板104的水平部分，而弯折部可以是背板104的竖直部分，水平部分和竖直部分可以限定类似凹槽的空间。在某些实施例中，背板104与散热件101之间可以设置有导热胶带107。导热胶带107的设置一方面便于散热件101的固定，另一方面可以辅助散热件101散热。
光源105可以是设置在导光板106的侧部的侧入式光源。在一些实现方式中，光源105可以包括但不限于LED(Light Emitting Diode，发光二极管)灯条等。在一个或多个实施例中，光源105与散热件101之间设置有导热胶带107。导热胶带107的设置一方面便于光源105的固定，另一方面可以辅助散热件101散热。
反射件102设置在导光板106靠近背板101的一侧。反射件102可以将从导光板106中出射的光线反射至导光板106中，以提高光线利用率。在一些实施例中，反射件102可以是反射片。
热缓冲件103设置在散热件101与反射件102之间。热缓冲件103在垂直于背光模组出光面的方向上的导热系数小于散热件101在垂直于背光模组出光面的方向上的导热系数。在一些实施例中，热缓冲件的材料例如可以包括复合硅酸镁铝隔热涂料、稀土保温涂料等。
需要说明的是，上述垂直于背光模组出光面的方向也可以理解为垂直于导光板106的出光面(图1所示导光板106的上表面)的方向。
上述实施例提供的背光模组中，散热件与反射件之间设置有热缓冲件，这使得散热件的至少部分热量先经过热缓冲件后才被传递至反射件。由于热缓冲件在垂直于背光模组出光面的方向上的导热系数小于散热件在垂直于背光模组出光面的方向上的导热系数，如此，可以降低反射件从散热件获得的热量，减小反射件由于受热导致的变形，从而提高背光模组发出的光的均匀性。
应理解，虽然图1示出的散热件101在靠近反射件102的一面具有凹槽，但这仅仅是示意性的，并不作为对本公开的限制。
在一些实施例中，背光模组包括多个热缓冲件103，多个热缓冲件103中靠近光源105的热缓冲件103在垂直于背光模组出光面的方向上的导热系数小于远离光源105的热缓冲件103在垂直于背光模组出光面的方向上的导热系数。如此，传递至反射件102靠近光源105的部分的热量与传递至远离光源105的部分的热量比较接近，使得反射件102的受热更均匀，不同位置的变形也更均匀，从而可以进一步提高背光模组发出的光的均匀性。
以下结合图2和图3介绍根据本公开另一些实施例的背光模组。需要说明的是，在下面的描述中，仅重点介绍图2、图3与图1所示背光模组的不同之处，其他相同或相似之处可以参照上面的描述。
图2是根据本公开另一些实施例的背光模组的结构示意图。
如图2所示，散热件101具有靠近反射件102的第一面111、以及远离反射件102与第一面111相对的第二面121。散热件101的第一面111具有第一散热凹槽1011。一个或多个热缓冲件103中的至少一个设置在第一散热凹槽1011中。
在一些实现方式中，一部分热缓冲件103可以设置在第一散热凹槽1011中，其他的热缓冲件103可以设置在第一面111除第一散热凹槽1011之外的区域与反射件102之间，如图2所示。在另一些实现方式中，全部的热缓冲件103可以设置在第一散热凹槽1011中。
上述实施例提供的背光模组中，至少一个热缓冲件设置在第一散热凹槽中。在背光模组厚度一定的情况下，设置在第一散热凹槽中的热缓冲件的厚度可以设置地较厚。这使得传递至反射件的热量更少，从而可以进一步提高背光模组发出的光的均匀性。
在一些实施例中，散热件101与反射件102不直接接触。这种情况下，散热件101的任意位置与反射件102均不直接接触，如此可以进一步减小传递至反射件102的热量，从而更进一步提高背光模组发出的光的均匀性。另外，热缓冲件103与反射件102直接接触，可以起到支撑反射件102的作用。
图3是根据本公开又一些实施例的背光模组的结构示意图。
如图3所示，散热件101具有靠近反射件102的第一面111、以及远离反射件102与第一面111相对的第二面121。散热件101的第一面111具有第一散热凹槽1011。一个或多个热缓冲件103设置在第一面111除第一散热凹槽1011之外的区域与反射件102之间。在一些实施例中，热缓冲件103可以包括隔热涂层。隔热涂层可以与散热件101一体成型，从而有利于保持底反射件102的平整程度，减小底反射片102的变形，从而可以更进一步提高背光模组发出光的均匀性。
在一个或多个实施例中，在图2或图3所示的背光模组中，散热件101远离反射件102的第二面121可以具有第二散热凹槽(图中未示出)，从而有利于散热件101的热量的消散。
图4是根据本公开一些实施例的显示装置的结构示意图。如图4所示，显示装置400可以包括上述任意一个实施例的背光模组401。显示装置400例如可以包括显示面板、移动终端、电视机、显示器、笔记本电脑、数码相框、导航仪、电子纸等任何具有显示功能的产品或部件。
图5是根据本公开一些实施例的背光模组的制造方法的流程示意图。
在步骤502，在背板上设置散热件，该散热件用于消散光源产生的热量。
例如，散热件可以是散热片。例如，光源可以是LED灯条。
在步骤504，在散热件远离背板的一侧设置一个或多个热缓冲件。这里，热缓冲件在垂直于背光模组出光面的方向上的导热系数小于散热件在垂直于背光模组出光面的方向上的导热系数。
在步骤506，在一个或多个热缓冲件远离散热件的一侧设置反射件。
在形成反射件后还可以在反射件上设置导光板。进而，可以在导光板上设置光学 膜片等。
上述实施例中，在散热件与反射件之间设置了热缓冲件，这使得散热件的至少部分热量先经过热缓冲件后才被传递至反射件。由于热缓冲件在垂直于背光模组出光面的方向上的导热系数小于散热件在垂直于背光模组出光面上的方向的导热系数，如此，可以降低反射件从散热件获得的热量，减小反射件由于受热导致的变形，从而提高背光模组发出的光的均匀性。
至此，已经详细描述了本公开的各实施例。为了避免遮蔽本公开的构思，没有描述本领域所公知的一些细节。本领域技术人员根据上面的描述，完全可以明白如何实施这里公开的技术方案。
虽然已经通过示例对本公开的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本公开的范围。本领域的技术人员应该理解，可在不脱离本公开的范围和精神的情况下，对以上实施例进行修改或者对部分技术特征进行等同替换。本公开的范围由所附权利要求来限定。

Claims (19)

  1. 一种背光模组，包括：
    位于背板上的散热件，用于消散光源产生的热量；
    反射件，设置在导光板靠近所述背板的一侧；以及
    一个或多个热缓冲件，设置在所述散热件与所述反射件之间，所述热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于所述散热件在垂直于所述背光模组出光面的方向上的导热系数。
  2. 根据权利要求1所述的背光模组，其中，所述多个热缓冲件中靠近所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于远离所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数。
  3. 根据权利要求1所述的背光模组，其中，所述散热件与所述反射件不直接接触。
  4. 根据权利要求1所述的背光模组，其中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件中的至少一个设置在所述第一散热凹槽中。
  5. 根据权利要求1所述的背光模组，其中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件设置在所述第一面除所述第一散热凹槽之外的区域与所述反射件之间。
  6. 根据权利要求4或5所述的背光模组，其中，所述散热件远离所述反射件的第二面具有第二散热凹槽。
  7. 根据权利要求5所述的背光模组，其中，所述热缓冲件包括隔热涂层。
  8. 根据权利要求1所述的背光模组，其中，所述背板和所述光源中的至少一个 与所述散热件之间设置有导热胶带。
  9. 根据权利要求1所述的背光模组，其中，所述背板包括本体和设置在所述本体的端部的弯折部，所述本体和所述弯折部限定容纳所述散热件的空间。
  10. 一种显示装置，包括：如权利要求1-9任意一项所述的背光模组。
  11. 一种背光模组的制造方法，包括：
    在背板上设置散热件，所述散热件用于消散光源产生的热量；
    在所述散热件远离所述背板的一侧设置一个或多个热缓冲件，所述热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于所述散热件在所述背光模组出光面的方向上的导热系数；以及
    在所述一个或多个热缓冲件远离所述散热件的一侧设置反射件。
  12. 根据权利要求11所述的方法，其中，所述多个热缓冲件中靠近所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数小于远离所述光源的热缓冲件在垂直于所述背光模组出光面的方向上的导热系数。
  13. 根据权利要求11所述的方法，其中，所述散热件与所述反射件不直接接触。
  14. 根据权利要求11所述的方法，其中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件中的至少一个设置在所述第一散热凹槽中。
  15. 根据权利要求11所述的方法，其中，所述散热件靠近所述反射件的第一面具有第一散热凹槽，所述一个或多个热缓冲件设置在所述第一面除所述第一散热凹槽之外的区域与所述反射件之间。
  16. 根据权利要求14或15所述的方法，其中，所述散热件远离所述反射件的第二面具有第二散热凹槽。
  17. 根据权利要求15所述的方法，其中，所述热缓冲件包括隔热涂层。
  18. 根据权利要求11所述的方法，其中，所述背板和所述光源中的至少一个与所述散热件之间设置有导热胶带。
  19. 根据权利要求11所述的方法，其中，所述背板包括本体和设置在所述本体的端部的弯折部，所述本体和所述弯折部限定容纳所述散热件的空间。
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