WO2014172987A1 - 背光模组及液晶显示器 - Google Patents

背光模组及液晶显示器 Download PDF

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Publication number
WO2014172987A1
WO2014172987A1 PCT/CN2013/077918 CN2013077918W WO2014172987A1 WO 2014172987 A1 WO2014172987 A1 WO 2014172987A1 CN 2013077918 W CN2013077918 W CN 2013077918W WO 2014172987 A1 WO2014172987 A1 WO 2014172987A1
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WO
WIPO (PCT)
Prior art keywords
plate
backlight module
optical
hanging member
liquid crystal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/077918
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English (en)
French (fr)
Inventor
萧宇均
黄冲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/000,628 priority Critical patent/US9482811B2/en
Publication of WO2014172987A1 publication Critical patent/WO2014172987A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133322Mechanical guidance or alignment of LCD panel support components

Definitions

  • a liquid crystal display mainly includes a backlight module and a liquid crystal display panel.
  • the liquid crystal display panel itself does not emit light, and the image display screen is mainly displayed by the display light source provided by the backlight module.
  • the light guide plate is assembled by the riveting of the back plate and the groove of the light guide plate, and the optical film is positioned by the riveting column of the back plate, and then pasted with double-sided tape. fixed.
  • the light guide plate is positioned by the stud of the back plate, and the groove of the light guide plate is broken due to the stress concentration of the groove of the light guide plate, and the light guide plate is limited.
  • the thermal expansion when the light guide plate is thermally expanded, easily causes the light guide plate to bulge and affects the optical quality of the liquid crystal display.
  • the optical film is also fixed by the double-sided tape to fix the thermal expansion of the optical film. When the optical film is thermally expanded, the optical film is prone to wavy bending, which affects the optical quality of the liquid crystal display.
  • an object of the present invention is to provide a backlight module including an optical plate and an optical film, at least one side of the optical film having at least one lug, the lug A through hole is further disposed, the backlight module further includes at least one hanging member, wherein a side of the optical plate corresponding to the side of the optical film provided with the lug is fixedly connected with the hanging member, the optical film It is disposed on the optical plate, and the through hole is hung on the hanging member to fix the optical film.
  • Another object of the present invention is to provide a liquid crystal display including a backlight module and a liquid crystal display panel disposed opposite to the backlight module, and the backlight module provides a display light source to the liquid crystal display panel.
  • the backlight module includes an optical plate and an optical film.
  • the optical film has at least one lug on at least one side thereof, the through hole is provided with a through hole, and the backlight module further includes at least one hanging piece. a side surface of the optical plate corresponding to the side of the optical film provided with the lug is fixedly connected to the hanging member, the optical film is disposed on the optical plate, and the through hole is hung on the Hanging parts make the optical film fixedly positioned.
  • the backlight module further includes a back plate and at least one limiting member
  • the hanging member is integrally formed by the first plate and the second plate in an L shape
  • the width of the second plate is greater than that of the first plate
  • the width of the third plate and the fourth plate are integrally formed in an L shape, wherein the fourth plate is vertically fixed to the back plate and defines a limiting space with the third plate.
  • the second board is inserted into the limiting space to move the hanging member relative to the limiting member toward the sky side of the backlight module, and the first board is fixedly connected to one side of the optical board and surrounds the through hole of the lug .
  • the two sides of the end of the third plate extend outward to form an extension portion, the width of the second plate is greater than the distance between the two extension portions, and the first plate is defined by the two extension portions.
  • one side of the optical plate is bonded and fixed to the hanging member.
  • one side of the optical plate and the hanging member are bonded and fixed by a double-sided tape.
  • the material of the hanging member is metal
  • the material of the limiting member is plastic or rubber.
  • the optical plate is a light guide plate or a diffusion plate.
  • the backlight module and the liquid crystal display of the invention can improve the fixing reliability of the optical plate, and avoid the thermal expansion of the optical plate, and the optical plate and the optical film can simultaneously expand and move, thereby avoiding the wavy shape of the optical film. Bending, which in turn improves the optical quality of the backlight module.
  • 1A, 1B, and 1C are a side view, a front view, and a top view, respectively, of a hanger according to an embodiment of the present invention.
  • 2A and 2B are a side view and a plan view, respectively, of a stopper according to an embodiment of the present invention.
  • 3 is a schematic diagram of a backlight module in accordance with an embodiment of the present invention.
  • 4A is an enlarged schematic view of a region A in FIG. 3.
  • 4B is a cross-sectional view taken along line AA of FIG. 4A.
  • FIG. 5 is a state diagram of a backlight module before and after thermal expansion according to an embodiment of the present invention.
  • 1A, 1B, and 1C are a side view, a front view, and a top view, respectively, of a hanger according to an embodiment of the present invention. Referring to FIGS.
  • the hanger 3 is L-shaped and includes an integrally formed first plate 31 and second plate 32, wherein the width of the second plate 32 is greater than the width of the first plate 31, and first The plate 31 is used for fixing the optical plate and the set optical film.
  • the optical plate in this embodiment may be, for example, a light guide plate; the function of the second plate 32 will be described below.
  • SECC electrogalvanized steel sheet
  • SGCC hot dip galvanized steel sheet
  • AL5052 aluminum alloy a metal material with good rigidity
  • the metal material used for the hanging member 3 is not limited thereto.
  • 2A is a side view of a stop member in accordance with an embodiment of the present invention.
  • 2B is a top plan view of a stop member in accordance with an embodiment of the present invention.
  • the limiting member 4 is also L-shaped, and includes an integrally formed third plate 41 and a fourth plate 42. The two sides of the end portion of the third plate 41 extend outward to form an extending portion 411, respectively. , 412, and further a groove 43 is formed.
  • the width of the first plate 31 of the hanger 3 is equal to or slightly smaller than the distance between the extensions 411, 412 (i.e., the width of the groove 43), so that the first plate 31 can be freely moved relative to the extensions 411, 412, and at the same time,
  • the width of the second plate 32 of the pendant 3 is greater than the distance between the extensions 411, 412 (i.e., the width of the groove 43), preventing the second plate 32 from being disengaged when moved to the groove 43.
  • the limiting member 4 it can be made of plastic material or rubber material.
  • 3 is a schematic diagram of a backlight module in accordance with an embodiment of the present invention.
  • the backlight module of the embodiment is a side-lit backlight module.
  • the backlight module of the embodiment is disposed relative to the liquid crystal display panel to form a liquid crystal display.
  • the backlight module of the embodiment provides a display light source to the liquid crystal display panel. , so that the LCD panel displays images.
  • the backlight module is placed upright after assembly, and the light in the backlight module Learning components (for example, optical diaphragms and light guides) will move toward the ground side of the backlight module (ie, the side of the backlight module that is placed parallel to the ground and adjacent to the ground) due to its own weight.
  • the side ie, the side of the backlight module that is placed parallel to the ground and placed away from the ground
  • the backlight module is provided with at least one device for fixing the optical component to prevent the optical component from moving to the ground side due to its own weight. Therefore, the backlight module according to the embodiment of the present invention
  • Three sets of the aforementioned combination of the hanging member 3 and the limiting member 4 are disposed on the side of the backlight module to fix the positioning optical film 2 and the light guiding plate (not shown) located under the optical film 2.
  • the optical film 2 has three lugs 21 on the side corresponding to the side of the backlight module.
  • the number of combinations of the hanging member 3 and the limiting member 4 disposed on the side of the backlight module is not limited to that shown in FIG. 3, and may be any number.
  • the number of the lugs 21 of the optical film 2 corresponding to the side of the backlight module corresponds to the number of combinations of the hangers 3 and the limiting members 4 provided on the sky side of the backlight module, and the present invention Not limited to the one shown in Figure 3.
  • the sky side and the ground side are defined according to the person after the backlight module is placed upright, and the present invention is not limited thereto.
  • the backlight module may also be in the sky side.
  • At least one side of the adjacent side is provided with at least one device for fixing the optical component.
  • two sets of the hanging member 3 and the limiting member 4 are disposed on either side adjacent to the sky side of the backlight module. The combination is such that when the backlight module is placed upright, the optical film 2 and the light guide plate located under the optical film 2 can be fixed.
  • the side of the optical film 2 corresponding to either side of the side of the backlight module has two lugs 21 .
  • the number of combinations of the hanging member 3 and the limiting member 4 disposed on either side adjacent to the sky side of the backlight module is not limited to that shown in FIG. 3, and may be any number.
  • the number of the lugs 21 on the side corresponding to either side of the optical film 2 adjacent to the side of the backlight module and the hangers 3 provided on either side adjacent to the side of the backlight module are The number of combinations of the limiting members 4 corresponds to each other, and the present invention is not limited to the one shown in FIG. In the following, in the backlight module of the present embodiment, how to fix the optical film and the light guide plate using the hanging member and the limiting member will be described in detail.
  • a backlight module according to an embodiment of the present invention includes: a light guide plate 1, an optical film 2, a hanging member 3, a limiting member 4, and a backing plate 5.
  • One end of the fourth plate 42 of the limiting member 4 is vertically fixed to the backing plate 5, and the third plate 41 of the limiting member 4 is disposed parallel to the backing plate 5 and has a certain distance from the backing plate 5, so that the limiting member 4
  • the third plate 41, the fourth plate 42 and the back plate 5 are enclosed to form an open limiting space.
  • the first plate 31 of the hanging member 3 is erected perpendicularly above the back plate 5 and fits into the recess 43 of the limiting member 4 so that the long plate of the hanging member 3 is defined by the two extending portions 411, Between 412, the details will be described below.
  • the light guide plate 1 is placed on the third plate 41 of the limiting member 4 such that one side of the light guide plate 1 is fixedly coupled to the third plate 41.
  • the optical film 2 is disposed on the light guide plate 1, and the through hole 211 provided in the lug 21 is hung on the first plate 31 of the hanging member 3 to fix the optical film 2 in a fixed position.
  • the light guide plate 1 and the optical film 2 are fixedly connected to the first plate 31 of the hanger 3.
  • FIG. 5 is a state diagram of a backlight module before and after thermal expansion according to an embodiment of the present invention.
  • the left side of FIG. 5 is a state diagram of the backlight module of the present embodiment before being thermally expanded, and the right drawing of FIG. 5 is a state diagram of the backlight module of the present embodiment after being thermally expanded.
  • both the light plate 1 and the optical film 2 are fixedly connected to the first plate 31 of the hanging member 3, so that the light guide plate 1 can drive the optical film 2 to move toward the sky side, so that the light guide plate 1 can be prevented from being thermally expanded and arched, and The wavy bending of the optical film 2 can be avoided.
  • the extensions 411, 412 of the limiting member 4 restrict the movement of the hanging member 3 toward either side of the side adjacent to the celestial side, thereby avoiding lateral displacement of the hanging member 3 and disengaging from the combination with the limiting member 4. .
  • the distance between the extending portions 411, 412 is smaller than the width of the second plate 32 of the hanging member 3, that is, the second plate 32 of the hanging member 3 moves between the extending portions 411, 412, it does not escape from the limiting member. 4 limits.
  • the moving distance to the ground side can compensate for the aforementioned moving distance D from the light guide plate 1 to the sky side, thereby avoiding the optical film 2 at the ground side end. Partially breaks the cover pressure of the plastic frame 6. It should be understood that the limiting member 4 can be omitted, and the light guide plate 1 and the optical film 2 are fixed together by using the hanging member 3, and the optical film 2 can be driven to expand and move when the thermal expansion plate is moved. .
  • the hanging member 3 is prone to loosening of the double-sided tape at the fixed connection between the light guide plate 1 and the hanging member 3, resulting in unreliable connection. Therefore, the use of the limiting member 4 applies a balancing force to the second plate 32 of the hanging member 3 to prevent the double-sided tape from being loosened, thereby improving the reliability of the connection; meanwhile, the extending portions 411, 412 of the limiting member 4 can be limited.
  • the hanging member 3 is laterally displaced from the combination with the limiting member 4.
  • the above description is only for the side-entry backlight module used in the liquid crystal display, but the invention is not limited thereto, and those skilled in the art should understand that
  • the direct-type backlight module used in the display replaces the above-mentioned light guide plate with a diffusion plate, and the above-mentioned combination of the hanging member and the limit member can also be used to fix the positioning optical film and the diffusion plate.

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

Abstract

提供了一种背光模组及液晶显示器。该背光模组包括光学板、光学膜片(2)和吊挂件(3),光学膜片(2)的至少一侧边具有至少一凸耳(21),凸耳(21)上设有一通孔(211),其中与光学膜片(2)设有凸耳(21)的侧边相对应的光学板的一侧面与吊挂件(3)固定连接,光学膜片(2)设于光学板之上,并且通孔(211)套挂于吊挂件(3),使光学膜片(2)固定定位。该背光模组可提高光学板的固定可靠性,同时避免了光学板受热膨胀拱起,并且光学板与光学膜片(2)可同时膨胀移动,避免了光学膜片(2)出现波浪状的弯曲,进而提高了背光模组的光学品位。

Description

光模组及液晶显示器
技术领域 本发明涉及液晶显示领域; 更具体地讲, 涉及一种背光模组及液晶显示器。 背景技术 液晶显示器主要包括背光模组和液晶显示面板; 其中, 液晶显示面板本身 不发光, 其主要通过背光模组提供的显示光源而显示图像画面。 在使用侧入式背光模组的液晶显示器中, 导光板通过背板的铆柱与导光板 的凹槽配合组装进行定位, 光学膜片通过背板的铆柱定位, 而后使用双面胶粘 贴固定。 然而, 在对液晶显示器进行冲击或震动试验时, 导光板通过背板的铆柱定 位的方式会出现因导光板的凹槽口应力集中而使导光板的凹槽口破裂, 同时限 制了导光板的热膨胀, 当导光板受热膨胀时, 容易导致导光板拱起而影响了液 晶显示器的光学品位。 光学膜片通过双面胶粘贴固定的方式也限制了光学膜片 的热膨胀, 当光学膜片受热膨胀时, 光学膜片极易出现波浪状的弯曲, 进而影 响了液晶显示器的光学品位。 同样地, 在使用直下式背光模组的液晶显示器中, 也存在上述的问题, 只是将上述的导光板换为扩散板即可。 发明内容 为了解决上述现有技术存在的问题, 本发明的目的在于提供一种背光模组, 包括光学板和光学膜片, 光学膜片的至少一侧边具有至少一凸耳, 所述凸耳上 设有一通孔, 所述背光模组还包括至少一吊挂件, 其中, 与光学膜片设有凸耳 的侧边相对应的光学板的一侧面与所述吊挂件固定连接, 光学膜片设于光学板 之上, 并且所述通孔套挂于所述吊挂件, 使得光学膜片固定定位。 本发明的另一目的还在于提供一种液晶显示器, 其包括背光模组以及与背 光模组相对设置的液晶显示面板, 背光模组提供显示光源给液晶显示面板, 其 中, 所述背光模组包括光学板和光学膜片, 光学膜片的至少一侧边具有至少一 凸耳, 所述凸耳上设有一通孔, 所述背光模组还包括至少一吊挂件, 其中, 与 光学膜片设有凸耳的侧边相对应的光学板的一侧面与所述吊挂件固定连接, 光 学膜片设于光学板之上, 并且所述通孔套挂于所述吊挂件, 使得光学膜片固定 定位。 此外, 所述背光模组还包括背板和至少一限位件, 所述吊挂件由第一板和 第二板呈 L形一体成型, 所述第二板的宽度大于所述第一板的宽度, 所述限位 件由第三板和第四板呈 L形一体成型, 其中, 所述第四板垂直固定于背板上并 与所述第三板围成一限位空间, 所述第二板插入限位空间内, 以使吊挂件相对 于限位件朝向背光模组的天侧移动, 所述第一板与光学板的一侧面固定连接并 套挂所述凸耳的通孔。 此外, 所述第三板的端部的两侧向外延伸分别形成延伸部, 所述第二板的 宽度大于两个延伸部之间的距离, 所述第一板限定于两个延伸部之间, 以限制 吊挂件朝向与背光模组的天侧相邻的两侧中的任一侧移动。 此外, 所述光学板的一侧面与所述吊挂件黏结固定。 进一歩地, 所述光学 板的一侧面与所述吊挂件通过双面胶带黏结固定。 此外, 所述吊挂件的材质为金属, 所述限位件的材质为塑胶或橡胶。 此外, 所述光学板为导光板或扩散板。 本发明的背光模组及液晶显示器, 可提高光学板的固定可靠性, 同时避免 了光学板受热膨胀拱起, 并且光学板与光学膜片可同时膨胀移动, 避免了光学 膜片出现波浪状的弯曲, 进而提高了背光模组的光学品位。 附图说明
图 1A、 图 1B和图 1C分别是根据本发明的实施例的吊挂件的侧视图、主视 图和俯视图。 图 2A、 图 2B分别是根据本发明的实施例的限位件的侧视图和俯视图。 图 3是根据本发明的实施例的背光模组的示意图。 图 4A是图 3中的 A区域的放大示意图。 图 4B是图 4A的 A-A向剖视图。 图 5是根据本发明的实施例的背光模组受热膨胀前和受热膨胀后的状态图。 具体实施方式 现在对本发明的实施例进行详细的描述, 其示例表示在附图中, 其中, 相 同的标号始终表示相同部件。 下面通过参照附图对实施例进行描述以解释本发 明。 在下面的描述中, 为了避免公知结构和 /或功能的不必要的详细描述所导致 的本发明构思的混淆, 可省略公知结构和 /或功能的不必要的详细描述。 图 1A、 图 1B和图 1C分别是根据本发明的实施例的吊挂件的侧视图、主视 图和俯视图。 参照图 1A、 IB和图 1C, 吊挂件 3呈 L状, 其包括一体成型的第一板 31 和第二板 32, 其中, 第二板 32的宽度大于第一板 31的宽度, 并且第一板 31用 于固定连接光学板以及套设定位光学膜片, 本实施例中的光学板例如可为导光 板; 第二板 32所起到的作用将在下文描述。 为了在实际使用中吊挂件 3整体可 靠性高, 可选用刚性较好的金属材质制作, 例如: 电镀锌钢板 (SECC )、 热浸 锌钢板 (SGCC) 或 AL5052铝合金等。 当然, 在本发明中, 吊挂件 3所使用的 金属材质并不以此为限。 图 2A是根据本发明的实施例的限位件的侧视图。 图 2B是根据本发明的实 施例的限位件的俯视图。 参照图 2A、 2B, 限位件 4也呈 L状, 其包括一体成型的第三板 41和第四 板 42, 其中, 第三板 41 的端部的两侧向外延伸分别形成延伸部 411、 412, 进 而形成了凹槽 43。 吊挂件 3的第一板 31的宽度等于或略小于延伸部 411、 412 之间的距离 (即凹槽 43的宽度), 使得第一板 31可相对延伸部 411、 412 自由 移动, 同时, 吊挂件 3的第二板 32的宽度大于延伸部 411、 412之间的距离(即 凹槽 43的宽度), 避免第二板 32移动到凹槽 43处时脱离了限制。 为了使得限 位件 4具有较好的弹性, 可选用塑胶材质或者橡胶材质制作。 图 3是根据本发明的实施例的背光模组的示意图。 本实施例的背光模组为侧入式背光模组, 本实施例的背光模组相对于液晶 显示面板设置, 以形成液晶显示器; 其中, 本实施例的背光模组提供显示光源 给液晶显示面板, 以使液晶显示面板显示影像。 参照图 3, 在实际应用中, 背光模组装配后都会正立放置, 背光模组中的光 学组件 (例如, 光学膜片和导光板) 会因自重而向背光模组的地侧 (即背光模 组正立放置后平行并邻近于地面的一侧) 移动, 需要在背光模组的天侧 (即背 光模组正立放置后平行并远离地面的一侧)设置至少一个固定光学组件的装置, 避免光学组件由于自重而向地侧移动, 因此, 根据本发明的实施例的背光模组 在背光模组的天侧设置三组前述的吊挂件 3与限位件 4的组合, 以固定定位光 学膜片 2以及位于光学膜片 2下方的导光板 (未示出)。 对应地, 光学膜片 2与 背光模组的天侧对应的侧边具有三个凸耳 21。 应当理解, 在本发明中, 在背光模组的天侧设置的吊挂件 3与限位件 4的 组合的数量并不以图 3中所示的为限, 可以为任意数量。 而且, 光学膜片 2与 背光模组的天侧对应的侧边具有的凸耳 21的数量与背光模组的天侧设置的吊挂 件 3与限位件 4的组合的数量相对应, 本发明并不以图 3所示为限。 另外, 为 了便于描述, 天侧和地侧是根据背光模组正立放置后人为规定的, 本发明并不 以此为限。 此外, 对于超大尺寸的液晶显示器, 除如前述的正立放置以外, 还会存在 竖立放置 (即上述的正立放置旋转 90度) 的可能, 因此, 也可在背光模组的与 天侧相邻的任意一侧设有至少一个固定光学组件的装置, 这样, 在本实施例中, 在与背光模组的天侧相邻的任意一侧设有两组吊挂件 3与限位件 4的组合, 以 便在背光模组竖立放置时, 可固定定位光学膜片 2以及位于光学膜片 2下方的 导光板。 对应地, 光学膜片 2与背光模组的天侧相邻的任意一侧对应的侧边具 有两个凸耳 21。 当然, 在本发明中, 在与背光模组的天侧相邻的任意一侧设有 的吊挂件 3与限位件 4的组合数量也并不以图 3所示为限, 可以为任意数量。 而且, 光学膜片 2与背光模组的天侧相邻的任意一侧对应的侧边具有的凸耳 21 的数量和背光模组的天侧相邻的任意一侧设有的吊挂件 3与限位件 4的组合数 量相对应, 本发明并不以图 3所示为限。 以下文中, 将对在本实施例的背光模组中, 使用吊挂件和限位件如何固定 光学膜片和导光板进行详细说明。 其中, 为了便于描述, 仅对本实施例的背光 模组的一处使用吊挂件和限位件固定光学膜片和导光板进行说明, 其他不再赘 述。 图 4A是图 3中的 A区域的放大示意图。 图 4B是图 4A的 A-A向剖视图。 参照图 4A、 4B, 根据本发明的实施例的背光模组包括: 导光板 1、 光学膜 片 2、 吊挂件 3、 限位件 4和背板 5。 限位件 4的第四板 42的一端垂直固定于背板 5上, 限位件 4的第三板 41 平行于背板 5设置并且与背板 5具有一定的距离, 这样, 限位件 4的第三板 41、 第四板 42和背板 5合围形成一开口的限位空间。 吊挂件 3的第二板 32平行于背板 5设置并且插入该开口的限位空间, 以使 吊挂件 3与限位件 4紧密组合, 并且第二板 32的尺寸与该开口的限位空间的尺 寸相匹配, 并可相对于该开口的限位空间自由出入。 如此, 吊挂件 3 的第一板 31正立垂直于背板 5之上, 并且配合置于限位件 4的凹槽 43内, 以使吊挂件 3 的长板限定于两个延伸部 411、 412之间, 具体将在下文描述。 导光板 1置于限位件 4的第三板 41之上, 以使导光板 1的一侧面与第三板 41固定连接。光学膜片 2设于导光板 1之上, 并且凸耳 21上设有的通孔 211套 挂于吊挂件 3的第一板 31, 以使光学膜片 2固定定位。 如此, 导光板 1和光学 膜片 2—并与吊挂件 3的第一板 31固定连接。 导光板 1的一侧面与第三板 41可通过双面胶带黏结固定, 也可使用其它现 有的黏结件将二者进行黏结固定, 本发明并不作具体限定。 此外, 也可利用黏 结剂将二者黏结固定。 图 5是根据本发明的实施例的背光模组受热膨胀前和受热膨胀后的状态图。 其中, 图 5中的左图是本实施例的背光模组受热膨胀前的状态图, 图 5中的右 图是本实施例的背光模组受热膨胀后的状态图。 参照图 5, 当导光板 1受热膨胀向背光模组的天侧方向移动时, 其膨胀移动 距离为 D, 导光板 1会推动吊挂件 3相对于限位件 4向天侧方向移动, 由于导 光板 1和光学膜片 2都与吊挂件 3的第一板 31固定连接, 因此导光板 1会带动 光学膜片 2—起朝向天侧移动, 如此, 可避免导光板 1受热膨胀拱起, 并且可 避免光学膜片 2出现波浪状的弯曲。 同时, 限位件 4的延伸部 411、 412限制吊 挂件 3朝向与天侧相邻的两侧中的任一侧移动, 避免了吊挂件 3发生侧移, 脱 离了与限位件 4的组合。 并且, 由于延伸部 411、 412之间的距离小于吊挂件 3 的第二板 32的宽度, 即吊挂件 3的第二板 32移动到延伸部 411、 412之间, 也 不会脱离限位件 4的限制。 此外, 光学膜片 2 由于自重会向地侧移动, 其向地侧的移动距离可弥补前 述的因导光板 1带动而向天侧的移动距离 D, 则避免了光学膜片 2在地侧端的 部分跳脱胶框 6的盖压。 应当理解, 限位件 4可不使用, 只需使用吊挂件 3将导光板 1与光学膜片 2 固定一起, 保证导光板 1在受热膨胀移动时, 可带动光学膜片 2—起膨胀移动 即可。 然而, 吊挂件 3在导光板 1 向上推力和光学膜片 2对其施加的重力的作 用下, 容易出现导光板 1与吊挂件 3固定连接处的双面胶带松开的现象, 导致 连接不可靠, 因此, 使用限位件 4对吊挂件 3的第二板 32施加一平衡力, 避免 双面胶带松开, 提高了连接的可靠性; 同时, 限位件 4的延伸部 411、 412可限 制吊挂件 3发生侧移, 脱离了与限位件 4的组合。 另外, 需要说明, 为了避免重复的描述, 上述的描述只是对应用于液晶显 示器中的侧入式背光模组进行了说明, 但本发明不限于此, 所述领域的技术人 员应当理解, 在液晶显示器中应用的直下式背光模组, 将上述的导光板替换为 扩散板, 也可使用上述的吊挂件和限位件的组合来固定定位光学膜片和扩散板。 尽管已经参照其示例性实施例具体显示和描述了本发明, 但是本领域的技 术人员应该理解, 在不脱离权利要求所限定的本发明的精神和范围的情况下, 可以对其进行形式和细节上的各种改变。

Claims

权 利 要 求 书
1、 一种背光模组, 包括光学板和光学膜片, 光学膜片的至少一侧边具有至 少一凸耳, 所述凸耳上设有一通孔, 其中, 所述背光模组还包括至少一吊挂件, 与光学膜片设有凸耳的侧边相对应的光学板的一侧面与所述吊挂件固定连接, 光学膜片设于光学板之上, 并且所述通孔套挂于所述吊挂件, 使得光学膜片固 定定位。
2、 根据权利要求 1 所述的背光模组, 其中, 所述背光模组还包括背板和 至少一限位件, 所述吊挂件由第一板和第二板呈 L形一体成型, 所述第二板的 宽度大于所述第一板的宽度, 所述限位件由第三板和第四板呈 L形一体成型, 其中, 所述第四板垂直固定于背板上并与所述第三板围成一限位空间, 所述第 二板插入限位空间内, 以使吊挂件相对于限位件朝向背光模组的天侧移动, 所 述第一板与光学板的一侧面固定连接并套挂所述凸耳的通孔。
3、 根据权利要求 2所述的背光模组, 其中, 所述第三板的端部的两侧向外 延伸分别形成延伸部, 所述第二板的宽度大于两个延伸部之间的距离, 所述第 一板限定于两个延伸部之间, 以限制吊挂件朝向与背光模组的天侧相邻的两侧 中的任一侧移动。
4、 根据权利要求 2所述的背光模组, 其中, 所述光学板的一侧面与所述吊 挂件黏结固定。
5、 根据权利要求 3所述的背光模组, 其中, 所述光学板的一侧面与所述吊 挂件黏结固定。
6、 根据权利要求 5所述的背光模组, 其中, 所述光学板的一侧面与所述吊 挂件通过双面胶带黏结固定。
7、 根据权利要求 2所述的背光模组, 其特征在于, 所述吊挂件的材质为金 属, 所述限位件的材质为塑胶。
8、 根据权利要求 2所述的背光模组, 其特征在于, 所述吊挂件的材质为金 属, 所述限位件的材质为橡胶。
9、 根据权利要求 1所述的背光模组, 其中, 所述光学板为导光板。
10、 根据权利要求 1所述的背光模组, 其中, 所述光学板为扩散板。
11、 一种液晶显示器, 包括背光模组以及与背光模组相对设置的液晶显示 面板, 背光模组提供显示光源给液晶显示面板, 其中, 所述背光模组包括光学 板和光学膜片, 光学膜片的至少一侧边具有至少一凸耳, 所述凸耳上设有一通 孔, 所述背光模组还包括至少一吊挂件, 其中, 与光学膜片设有凸耳的侧边相 对应的光学板的一侧面与所述吊挂件固定连接, 光学膜片设于光学板之上, 并 且所述通孔套挂于所述吊挂件, 使得光学膜片固定定位。
12、 根据权利要求 11所述的液晶显示器, 其中, 所述背光模组还包括背板 和至少一限位件, 所述吊挂件由第一板和第二板呈 L形一体成型, 所述第二板 的宽度大于所述第一板的宽度,所述限位件由第三板和第四板呈 L形一体成型, 其中, 所述第四板垂直固定于背板上并与所述第三板围成一限位空间, 所述第 二板插入限位空间内, 以使吊挂件相对于限位件朝向背光模组的天侧移动, 所 述第一板与光学板的一侧面固定连接并套挂所述凸耳的通孔。
13、 根据权利要求 12所述的液晶显示器, 其中, 所述第三板的端部的两侧 向外延伸分别形成延伸部, 所述第二板的宽度大于两个延伸部之间的距离, 所 述第一板限定于两个延伸部之间, 以限制吊挂件朝向与背光模组的天侧相邻的 两侧中的任一侧移动。
14、 根据权利要求 12所述的液晶显示器, 其中, 所述光学板的一侧面与所 述吊挂件黏结固定。
15、 根据权利要求 13所述的液晶显示器, 其中, 所述光学板的一侧面与所 述吊挂件黏结固定。
16、 根据权利要求 15所述的液晶显示器, 其中, 所述光学板的一侧面与所 述吊挂件通过双面胶带黏结固定。
17、 根据权利要求 12所述的液晶显示器, 其特征在于, 所述吊挂件的材质 为金属, 所述限位件的材质为塑胶。
18、 根据权利要求 12所述的液晶显示器, 其特征在于, 所述吊挂件的材质 为金属, 所述限位件的材质为橡胶。
19、 根据权利要求 11所述的液晶显
20、 根据权利要求 11所述的液晶显示器, 其中, 所述光学板为扩散板。
PCT/CN2013/077918 2013-04-22 2013-06-25 背光模组及液晶显示器 Ceased WO2014172987A1 (zh)

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