WO2013056478A1 - 背光模块及其透气元件 - Google Patents

背光模块及其透气元件 Download PDF

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Publication number
WO2013056478A1
WO2013056478A1 PCT/CN2011/081464 CN2011081464W WO2013056478A1 WO 2013056478 A1 WO2013056478 A1 WO 2013056478A1 CN 2011081464 W CN2011081464 W CN 2011081464W WO 2013056478 A1 WO2013056478 A1 WO 2013056478A1
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WO
WIPO (PCT)
Prior art keywords
gas permeable
backlight module
threaded portion
permeable membrane
module according
Prior art date
Application number
PCT/CN2011/081464
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English (en)
French (fr)
Inventor
张庞岭
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/379,292 priority Critical patent/US8641247B2/en
Publication of WO2013056478A1 publication Critical patent/WO2013056478A1/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
    • G02F1/133615—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 invention relates to a backlight module, and more particularly to a backlight module having a gas permeable member.
  • the heat sink is often used to derive the heat of the light source, but the temperature problem of the air inside the backlight module is not solved, and the backlight module has been developed toward ultra-thinning and narrow frame, so that It is difficult to effectively reduce the temperature inside the backlight module by using only the heat sink for heat dissipation, so that the thermal expansion of the light guide plate in the backlight module is increased, thereby causing optical problems, such as uneven display backlight due to surface distortion of the light guide plate.
  • the main object of the present invention is to provide a backlight module and a gas permeable member thereof to solve the optical problem caused by thermal expansion of the light guide plate by the air inside the backlight module in the prior art.
  • the invention provides a gas permeable element of a backlight module, comprising:
  • a tubular body having a hollow tubular shape comprising a first threaded portion at the bottom, a second threaded portion at the top, and a diaphragm supporting portion, the first threaded portion fixing the gas permeable member to a backlight module a threaded hole in a back plate, wherein the second threaded portion is provided with four notched long grooves, the diaphragm supporting portion is disposed in the tube body and has at least one venting port, the diaphragm supporting portion The height of the support point from the top of the pipe body is greater than the depth of the notch long groove;
  • a fixing ring body having a hollow ring shape and having an internal thread portion having a diameter slightly smaller than a diameter of the second thread portion, the fixing ring body being screwed into the second body of the tube body a threaded portion for fastening the gas permeable membrane in the tube;
  • the gas permeable element communicates the internal air of the backlight module and the outside air through the gas permeable membrane.
  • the present invention further provides a gas permeable element of a backlight module, comprising:
  • a tubular body having a hollow tubular shape comprising a first threaded portion at the bottom, a second threaded portion at the top, and a diaphragm supporting portion, the first threaded portion fixing the gas permeable member to a backlight module a second threaded portion is provided with at least two notched long grooves in a screw hole on the back plate, and the diaphragm supporting portion is disposed in the tube body and has at least one venting port, and the diaphragm supports The height of the support point from the top of the pipe body is greater than the depth of the long groove of the notch;
  • a fixing ring body having a hollow ring shape and having an internal thread portion having a diameter slightly smaller than a diameter of the second thread portion, the fixing ring body being screwed into the second body of the tube body a threaded portion for fastening the gas permeable membrane in the tube;
  • the gas permeable element communicates the internal air of the backlight module and the outside air through the gas permeable membrane.
  • the present invention further provides a backlight module, wherein a back panel of the backlight module is provided with a plurality of gas permeable members, and the gas permeable member comprises:
  • a tubular body having a hollow tubular shape including a first threaded portion at the bottom, a second threaded portion at the top, and a diaphragm support portion, the first threaded portion securing the gas permeable member to the backing plate
  • the second threaded portion is provided with at least two notch long grooves, and the diaphragm supporting portion is disposed in the tube body and has at least one venting port, and the diaphragm supporting portion is supported.
  • the height of the dot from the top of the pipe body is greater than the depth of the long groove of the notch;
  • a fixing ring body having a hollow ring shape and having an internal thread portion having a diameter slightly smaller than a diameter of the second thread portion, the fixing ring body being screwed into the second body of the tube body a threaded portion for fastening the gas permeable membrane in the tube;
  • the gas permeable element communicates the internal air of the backlight module and the outside air through the gas permeable membrane.
  • the outer diameter of the tubular body is further provided with a convex ring portion between the first threaded portion and the second threaded portion.
  • the inside of the diaphragm support portion is a Y-shaped or cross-shaped bracket.
  • the gas permeable membrane is a waterproof and dustproof gas permeable filter.
  • the gas permeable membrane has a circular sheet shape having a diameter equal to or slightly larger than a hollow inner diameter of the tubular body.
  • the second threaded portion has four of the notched elongated grooves.
  • the fixing ring body is a hex nut.
  • the gas permeable member is disposed on the back plate at a position close to the light bar.
  • the venting element of the present invention can circulate air inside the backlight module with external air, and can effectively reduce the temperature of the internal air, thereby reducing thermal expansion of the light guide plate in the backlight module and avoiding optical problems of the light guide plate.
  • Figure 1 is a perspective exploded view of a preferred embodiment of a gas permeable member of a backlight module of the present invention.
  • FIG. 2 is a partial schematic view of a backlight module of the present invention.
  • FIG 3 is a partial schematic view of a backlight module of the present invention.
  • FIG. 1 is an exploded perspective view of a preferred embodiment of a gas permeable member of a backlight module of the present invention.
  • the gas permeable member 100 of a backlight module of the present invention comprises a tube body 10, a gas permeable membrane 20, a membrane gasket 30 and a fixing ring body 40.
  • the tubular body 10 has a hollow tubular shape and includes a first threaded portion 11 at the bottom, a second threaded portion 12 at the top, and a diaphragm support portion 13.
  • the tube body 10 may be made of plastic, rubber or metal, but is not limited thereto.
  • the first threaded portion 11 is configured to fix the gas permeable member 100 to a back plate (not shown) of a backlight module; and the second thread portion 12 is provided with at least two notch long grooves 121.
  • the second threaded portion 12 has a margin that can be slightly retracted; and the diaphragm supporting portion 13 is disposed in a hollow portion of the tubular body 10, wherein the supporting point of the diaphragm supporting portion 13 is away from the The height of the hollow tubular top is greater than the depth of the notched long groove 121 to carry the gas permeable membrane 20.
  • the tube body 10 may optionally include a convex ring portion 14 , and the convex ring portion 14 is disposed on the outer diameter of the tubular body 10 and the first threaded portion 11 and the second threaded portion 12 .
  • the gas permeable member 100 can be provided on the mounting surface of the back panel of the backlight module (not shown), thereby improving the stability of the installation.
  • the number of the notch slots 121 is four, but the present invention does not limit the width, depth and number of the slot slots 121 , and the user can design the slot slots according to actual needs.
  • the width, depth and number of 121 are such that the second threaded portion 12 has the ability to properly retract.
  • the second threaded portion 12 has four notched slots 121.
  • the inside of the diaphragm supporting portion 13 is a design of a cross-shaped bracket, but the present invention does not limit the shape of the diaphragm supporting portion 13.
  • the diaphragm supporting portion 13 provides a large ventilation cross-sectional area as much as possible under the condition that the gas permeable membrane 20 can be carried.
  • the inside of the diaphragm supporting portion 13 may also be a Y-shaped bracket.
  • the gas permeable membrane 20 is a waterproof and dustproof gas permeable filter.
  • the gas permeable membrane 20 is in the form of a circular sheet having a diameter equal to or slightly larger than the tubular body.
  • the present invention does not limit the material of the gas permeable membrane 20, as long as it is a gas permeable material, preferably, the gas permeable membrane 20 has a certain level of ability to filter particles in the air, and has good water resistance. Sex.
  • the diaphragm gasket 30 is a hollow annular gasket, which can be made of a plastic or rubber film;
  • the fixing ring body 40 has a hollow ring shape, and specifically can be a hexagonal nut, and the fixing ring body 40
  • the interior has an internally threaded portion 42, and the diameter of the internally threaded portion 42 is slightly smaller than the diameter of the second threaded portion 12. Therefore, when the fixing ring body 40 is screwed into the second threaded portion 12 of the pipe body 10, the notch long groove 121 on the second threaded portion 12 can provide the second threaded portion 12 to be retracted. Margin.
  • FIG. 2 is a partial schematic view of the backlight module of the present invention
  • FIG. 3 is a partial schematic view of the backlight module of the present invention.
  • the backlight module 200 of the present invention mainly includes a back plate 210 , a light guide plate 220 , and at least one light bar 230 .
  • the light guide plate 220 is disposed in a frame formed by the back plate 210; the light bar 230 may be an LED light-emitting diode light bar disposed at a position close to a side surface of the light guide plate 220, and facing The side of the light guide plate 220 emits light to provide a source of illumination of the backlight module 200.
  • the backlight module 200 when the backlight module 200 is assembled on a liquid crystal display (not shown), the light bar 230 and the light guide plate 220 are disposed inside the liquid crystal display in a close seal state.
  • the back plate 210 of the backlight module 200 of the present invention is provided with a plurality of the gas permeable members 100, and the gas permeable member 100 can communicate the air and the outside air of the backlight module 200 to accelerate the heat dissipation of the backlight module 200. .
  • the gas permeable member 100 is disposed on the back plate 210 near the light bar 230 and arranged along the direction of the light bar 230 to obtain a better heat dissipation effect.
  • the invention does not limit the number and position of the venting elements 100, which can be planned by the user according to actual needs, and the manner in which the venting elements 100 are installed is detailed as follows.
  • the specific installation manner of the gas permeable member 100 provided by the present invention is as follows:
  • the gas permeable membrane 20 is disposed on a side of the membrane support portion 13 of the tubular body 10 facing the second threaded portion 12; then, the membrane gasket 30 is disposed on the gas permeable portion On the diaphragm 20, the fixing ring 40 is then screwed into the second threaded portion 12 of the tube 10. Since the diameter of the internal thread portion 42 of the fixing ring body 40 is slightly smaller than the diameter of the second thread portion 12, and the second thread portion 12 is provided with a plurality of the notch long grooves 121, there is an inner portionshrinking margin.
  • the fixing ring 40 When the fixing ring 40 is screwed into the second threaded portion 12 of the tubular body 10, the outer diameter of the second threaded portion 12 is contracted, so that the inner diameter thereof is also reduced inwardly. Therefore, the screwing of the fixing ring 40 can press the diaphragm gasket 30 from top to bottom to fasten the gas permeable membrane 20 on the diaphragm supporting portion 13 to achieve the gas permeable membrane. 20 fixed.
  • the first threaded portion 11 of the gas permeable member 100 is screwed into a corresponding screw hole (not shown) on the back plate 210 of the backlight module 200 to fix the gas permeable member 100.
  • the gas permeable member 100 is in air communication with both ends through the gas permeable membrane 20 (the direction of the arrow is the flow direction of the hot air), and the gas permeable membrane 20 has the ability to filter particles in the air.
  • the gas permeable membrane 20 has good water repellency and prevents moisture from entering the backlight module 200.
  • the air permeable member 100 of the present invention can circulate the air inside the backlight module 200 with the outside air, and effectively reduce the temperature of the internal air, thereby reducing thermal expansion of the light guide plate 220 in the backlight module 200, thereby avoiding
  • the light guide plate 220 creates an optical problem, for example, the display backlight is uneven due to surface distortion of the light guide plate.
  • the gas permeable membrane 20 can adopt a white surface, and since the white reflection effect is good, the reflection efficiency of the light inside the backlight module 200 can be improved, thereby improving the light utilization efficiency.
  • the gas permeable member 100 is disposed at the position of the back plate 210. If a reflective sheet or a heat dissipating aluminum extruded structure (not shown) is encountered, the corresponding position of the reflective sheet or the heat dissipating aluminum extruded structure may be opened.
  • the first threaded portion 11 of the gas permeable member 100 can be placed as close as possible to the lower surface of the light guide plate 220 to increase the heat dissipation effect.
  • the gas permeable member 100 may be provided with a rubber gasket between the convex ring portion 14 and the back plate 210 to increase the tightness between the first thread portion 11 and the back plate 210.
  • the present invention provides a plurality of the gas permeable members 100 on the back plate 210 of the backlight module 200, and the gas-permeable membrane is carried in the hollow tubular body 10 of the gas permeable member 100. 20, the air inside the backlight module 100 is circulated to the outside air, and the internal air temperature is effectively reduced, thereby reducing thermal expansion of the light guide plate 220 in the backlight module 100, thereby avoiding optical problems of the light guide plate 220.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)

Abstract

提供了一种背光模块（200）及其透气元件（100），所述背光模块（200）的背板（210）上设有多个所述透气元件（100）。所述透气元件（100）包含：一管体（10）、一透气膜片（20）、一膜片垫圈（30）及一固定环体（40）。所述管体（10）呈中空管状，所述管体（10）内承载所述透气膜片（20）。所述透气元件（100）可使所述背光模块（200）内部的空气与外部空气流通，并使内部空气温度有效降低，从而减少所述背光模块（200）内导光板（220）的热膨胀，避免导光板（220）产生光学问题。

Description

背光模块及其透气元件 技术领域
本发明涉及一种背光模块，特别是涉及一种具有透气元件的背光模块。
 背景技术
在液晶显示器面板(LCD panel)领域，以发光二极管(LED)做为背光光源比冷阴极荧光管(CCFL)更具有节能环保等优势，因此以LED取代CCFL将是背光发展的趋势，但LED的散热问题仍是影响其发展的重要因素，特别是侧入式LED背光模块受温度的影响很大。侧入式LED背光模块为了光学效果需要在光源与导光板之间保留稳定的耦光距离，但是在LED点亮后，LED的发热将使得背光模块内部的空气被加热，并通过空气的热传导，使得背光模块中的导光板的温度也随之快速升高。
为了降低背光模块的内部温度，经常采用散热片将光源的热量导出，然而并未能解决背光模块内部空气的温度问题，在加上背光模块已朝超薄化以及窄边框化的趋势发展，这样使得只使用散热片来进行散热的设计很难有效降低背光模块内部的温度，使得背光模块内导光板的热膨胀增加，从而造成光学问题，例如因为导光板的表面扭曲所造成的显示器背光不均匀。
 技术问题
本发明的主要目的是提供一种背光模块及其透气元件，以解决现有技术中因背光模块内部空气使导光板热膨胀而产生的光学问题。
 技术解决方案
本发明提供一种背光模块的透气元件，其包含：
一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于一背光模块的一背板上的一螺孔内，所述第二螺纹部上设有四个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
一凸环部，设于所述管体外径的所述第一螺纹部及所述第二螺纹部之间；
一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
一膜片垫圈，设于所述透气膜片上；及
一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
为达上述目的，本发明另提供一种背光模块的透气元件，其包含：
一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于一背光模块的一背板上的一螺孔内，所述第二螺纹部上设有至少两个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
一膜片垫圈，设于所述透气膜片上；及
一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
为达上述目的，本发明另提供一种背光模块，所述背光模块的一背板上设有多个透气元件，所述透气元件包含：
一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于所述背板上的一螺孔内，所述第二螺纹部上设有至少两个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
一膜片垫圈，设于所述透气膜片上；及
一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
在本发明的一实施例中，所述管体外径于所述第一螺纹部及所述第二螺纹部之间另设有一凸环部。
在本发明的一实施例中，所述膜片支撑部的内部是Y字形或十字形的支架。
在本发明的一实施例中，所述透气膜片是一防水及防尘的透气滤片。
在本发明的一实施例中，所述透气膜片呈圆形的片状，其直径等于或稍大于所述管体的中空内径。
在本发明的一实施例中，所述第二螺纹部具有四个所述缺口长槽。
在本发明的一实施例中，所述固定环体为一六角螺母。
在本发明的一实施例中，所述透气元件设于所述背板上靠近灯条的位置。
 有益效果
本发明的透气元件可使所述背光模块内部的空气与外部空气流通，并使内部空气的温度能有效的降低，从而减少所述背光模块内导光板的热膨胀，避免导光板产生光学问题。
 附图说明
图1是本发明背光模块的透气元件的较佳实施例的立体分解图。
图2是本发明背光模块的局部示意图。
图3是本发明背光模块的局部示意图。
 本发明的最佳实施方式
为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明。为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明如下。再者，本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参照图1，图1是本发明背光模块的透气元件的较佳实施例的立体分解图。如图1所示，本发明的一种背光模块的透气元件100包含一管体10、一透气膜片20、一膜片垫圈30及一固定环体40。所述管体10呈中空管状，其包含一位于底部的第一螺纹部11、一位于顶部的第二螺纹部12及一膜片支撑部13。所述管体10可由塑胶、橡胶或金属所制成，但不限于此。所述第一螺纹部11是用于将所述透气元件100固定于一背光模块的背板(图未示)上；所述第二螺纹部12上设有至少两个缺口长槽121，可使得所述第二螺纹部12具有可微量内缩的裕度；及所述膜片支撑部13设于所述管体10内的中空部份，其中膜片支撑部13的支撑点距所述中空管状顶部的高度大于缺口长槽121的深度，以承载所述透气膜片20。另外，所述管体10选择性的可包含一凸环部14，所述凸环部14设于所述管体10外径上的所述第一螺纹部11及所述第二螺纹部12之间，可提供所述透气元件100抵靠于背光模块背板的安装表面上(图未示)，从而提高安装的稳固性。
如图1所示，所述缺口长槽121的数量是4个，但本发明并不限制所述缺口长槽121的宽度、深度及数量，使用者可依实际需要来设计所述缺口长槽121的宽度、深度及数量，以使所述第二螺纹部12具有适当的内缩的能力。例如图1所示，所述第二螺纹部12具有四个所述缺口长槽121。另外，所述膜片支撑部13的内部是呈十字形支架的设计，但本发明并不限制所述膜片支撑部13的形状。优选地，所述膜片支撑部13在能满足承载所述透气膜片20的条件下，尽可能提供较大的通气截面积。例如，所述膜片支撑部13的内部也可以是一Y字形的支架。
再者，所述透气膜片20是一防水及防尘的透气滤片，在本实施例中，所述透气膜片20是呈圆形的片状，其直径等于或稍大于所述管体10的中空内径。本发明不限制所述透气膜片20的材质，只要是能透气的材质都可能被使用，优选地，所述透气膜片20是具有一定等级的过滤空气中粒子的能力，以及具良好的防水性。
另外，所述膜片垫圈30是一中空的环状垫圈，可由塑胶或橡胶膜所制成；所述固定环体40呈中空环状，具体可以为一六角螺母，所述固定环体40的内部则具有一内螺纹部42，并且所述内螺纹部42的直径略小于所述第二螺纹部12的直径。因此，当所述固定环体40旋入所述管体10的所述第二螺纹部12时，所述第二螺纹部12上的缺口长槽121可提供所述第二螺纹部12内缩的裕度。
请再同时参照图2及图3，图2是本发明背光模块的局部示意图；图3是本发明背光模块的局部示意图。如图2所示，本发明提供的背光模块200主要包含一背板210、一导光板220及至少一灯条230。所述导光板220设于以所述背板210所形成的框体内；所述灯条230可以是LED发光二极管灯条，其设于靠近所述导光板220的侧面的位置上，并朝向所述导光板220的侧边发射光线，以提供所述背光模块200的发光来源。
在本实施例中，在所述背光模块200被组装于一液晶显示器(图未示)时，所述灯条230及所述导光板220是以接近密封的情形设于所述液晶显示器的内部。当所述灯条230点亮时，所述背光模块200内部空气的温度快速升高，特别是在靠近所述灯条230的空气可能被加热到很高的温度。因此，本发明所述背光模块200的所述背板210上设有多个所述透气元件100，所述透气元件100可连通所述背光模块200内部空气与外部空气，加快背光模块200的散热。
优选地，所述透气元件100是设于所述背板210上靠近所述灯条230的位置，并沿着所述灯条230的方向排列设置，进而获得更好的散热效果。本发明并不限制设置所述透气元件100的数量与位置，使用者可依实际需要来规划，并且所述透气元件100安装的方式详述如后。
本发明提供的透气元件100的具体安装方式如下：
首先，将所述透气膜片20设于所述管体10的所述膜片支撑部13朝向所述第二螺纹部12的一侧；接着，将所述膜片垫圈30设于所述透气膜片20上；再接着，将所述固定环体40旋入所述管体10的所述第二螺纹部12。由于所述固定环体40的所述内螺纹部42的直径略小于所述第二螺纹部12的直径，并且所述第二螺纹部12上设有多个所述缺口长槽121而具有内缩的裕度。当所述固定环体40旋入所述管体10的第二螺纹部12时，所述第二螺纹部12的外部直径会产生内缩，从而其内部直径也随之向内微量的缩小。因此，所述固定环体40的旋入能由上往下的压迫所述膜片垫圈30，以紧固所述透气膜片20于所述膜片支撑部13上，达成所述透气膜片20的固定。
如图3所示，所述透气元件100的所述第一螺纹部11旋入所述背光模块200的背板210上对应设置的螺孔(图未示)内以固定所述透气元件100。所述透气元件100通过所述透气膜片20使两端空气连通（箭头方向为热空气的流动方向），并且所述透气膜片20是具有过滤空气中粒子的能力。另外，所述透气膜片20具有良好的防水性，可防止湿气进入所述背光模块200之内。因此，本发明的透气元件100可使所述背光模块200内部的空气与外部空气流通，并使内部空气温度有效的降低，从而减少所述背光模块200内所述导光板220的热膨胀，避免所述导光板220产生光学问题，例如，因为导光板的表面扭曲所造成的显示器背光不均匀。
再者，所述透气膜片20可采用白色的表面，由于白色的反射效果较好，因此可提高所述背光模块200内部光线的反射效率，从而提高光的利用率。另外，所述透气元件100设置在所述背板210的位置，若遇到反射片或散热铝挤构造(图未示)时，可将反射片或散热铝挤构造的相应位置开孔，以使得所述透气元件100的第一螺纹部11能尽量靠近所述导光板220的下表面，以增加散热的效果。另外，所述透气元件100可以添加一橡胶垫圈于所述凸环部14与所述背板210之间，以增加所述第一螺纹部11与所述背板210间的密封性。
综上所述，本发明通过在所述背光模块200的背板210上设有多个所述透气元件100，所述透气元件100的所述中空管状的管体10内承载所述透气膜片20，使所述背光模块100内部的空气与外部空气流通，并使内部空气温度有效降低，从而减少所述背光模块100内所述导光板220的热膨胀，避免所述导光板220产生光学问题。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。
 本发明的实施方式
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Claims (19)

  1. 一种背光模块的透气元件，其特征在于，其包含：
    一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于一背光模块的一背板上的一螺孔内，所述第二螺纹部上设有四个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
    一凸环部，设于所述管体外径的所述第一螺纹部及所述第二螺纹部之间；
    一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
    一膜片垫圈，设于所述透气膜片上；及
    一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
    其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
  2. 如权利要求1所述的背光模块的透气元件，其特征在于：所述膜片支撑部的内部是Y字形或十字形的支架。
  3. 如权利要求1所述的背光模块的透气元件，其特征在于：所述透气膜片是一防水及防尘的透气滤片。
  4. 如权利要求1所述的背光模块的透气元件，其特征在于：所述透气膜片呈圆形的片状，其直径等于或稍大于所述管体的中空内径。
  5. 如权利要求1所述的背光模块的透气元件，其特征在于：所述固定环体为一六角螺母。
  6. 一种背光模块的透气元件，其特征在于：其包含：
    一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于一背光模块的一背板上的一螺孔内，所述第二螺纹部上设有至少两个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
    一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
    一膜片垫圈，设于所述透气膜片上；及
    一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
    其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
  7. 如权利要求6所述的背光模块的透气元件，其特征在于：所述膜片支撑部的内部是Y字形或十字形的支架。
  8. 如权利要求6所述的背光模块的透气元件，其特征在于：所述透气膜片是一防水及防尘的透气滤片。
  9. 如权利要求6所述的背光模块的透气元件，其特征在于：所述透气膜片呈圆形的片状，其直径等于或稍大于所述管体的中空内径。
  10. 如权利要求6所述的背光模块的透气元件，其特征在于：所述第二螺纹部具有四个所述缺口长槽。
  11. 如权利要求6所述的背光模块的透气元件，其特征在于：所述固定环体为一六角螺母。
  12. 一种背光模块，其特征在于：所述背光模块的一背板上设有多个透气元件，所述透气元件包含：
    一管体，呈中空管状，包含一位于底部的第一螺纹部、一位于顶部的第二螺纹部及一膜片支撑部，所述第一螺纹部将所述透气元件固定于所述背板上的一螺孔内，所述第二螺纹部上设有至少两个缺口长槽，所述膜片支撑部设于所述管体内并具有至少一通气口，所述膜片支撑部的支撑点距所述管体顶部的高度大于所述缺口长槽的深度；
    一透气膜片，设于所述膜片支撑部朝向所述第二螺纹部的一侧；
    一膜片垫圈，设于所述透气膜片上；及
    一固定环体，呈中空环状，具有一内螺纹部，所述内螺纹部的直径略小于所述第二螺纹部的直径，所述固定环体旋入所述管体的所述第二螺纹部，以紧固所述透气膜片于所述管体内；
    其中，所述透气元件通过所述透气膜片连通所述背光模块的内部空气与外部空气。
  13. 如权利要求12所述的背光模块，其特征在于：所述透气元件设于所述背板上靠近灯条的位置。
  14. 如权利要求12所述的背光模块，其特征在于：所述管体外径于所述第一螺纹部及所述第二螺纹部之间另设有一凸环部。
  15. 如权利要求12所述的背光模块，其特征在于：所述膜片支撑部的内部是Y字形或十字形的支架。
  16. 如权利要求12所述的背光模块，其特征在于：所述透气膜片是一防水及防尘的透气滤片。
  17. 如权利要求12所述的背光模块，其特征在于：所述透气膜片呈圆形的片状，其直径等于或稍大于所述管体的中空内径。
  18. 如权利要求12所述的背光模块，其特征在于：所述第二螺纹部具有四个所述缺口长槽。
  19. 如权利要求12所述的背光模块，其特征在于：所述固定环体为一六角螺母。
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