WO2013159378A1 - 背光模组及液晶显示装置 - Google Patents

背光模组及液晶显示装置 Download PDF

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Publication number
WO2013159378A1
WO2013159378A1 PCT/CN2012/075067 CN2012075067W WO2013159378A1 WO 2013159378 A1 WO2013159378 A1 WO 2013159378A1 CN 2012075067 W CN2012075067 W CN 2012075067W WO 2013159378 A1 WO2013159378 A1 WO 2013159378A1
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WO
WIPO (PCT)
Prior art keywords
light
reflector
guide plate
light guide
disposed
Prior art date
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PCT/CN2012/075067
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English (en)
French (fr)
Inventor
黄建发
Original Assignee
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 US13/512,341 priority Critical patent/US20130286327A1/en
Publication of WO2013159378A1 publication Critical patent/WO2013159378A1/zh

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means 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
    • G02B6/0031Reflecting element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • G02B6/0085Means for removing heat created by the light source from the package
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • G02B6/0086Positioning aspects
    • G02B6/0091Positioning aspects of the light source relative to the light guide

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a backlight module and a liquid crystal display device.
  • a bottom-input type backlight module includes a light guide plate 11 , an aluminum extrusion 12 , a back plate 13 , a reflector 14 , a light source assembly 15 , and an optical film 16 .
  • the reflector 14 is disposed on a surface of the plastic frame 15 facing the light emitting direction of the light source assembly 15.
  • the light source assembly 15 is received in a receiving portion (not labeled) on the aluminum extrusion 12, and the light emitted by the light source assembly 15 is reflected by the reflector 14. It is incident on the light guide plate 11.
  • the plastic frame 17 is generally made of a plastic material, and the plastic material is easily deformed by force, the reflector 14 attached thereto is easily detached from the surface of the plastic frame 17, resulting in a decrease in coupling efficiency between the light source assembly 15 and the light guide plate 11. .
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device, which can enhance the stability of the optical component and improve the coupling efficiency between the light source component and the light guide plate.
  • a technical solution adopted by the present invention is to provide a backlight module, including: a light guide plate, comprising a light incident surface, a light emitting surface that is in contact with the light incident surface, and a light emitting surface opposite to the light emitting surface.
  • the bottom surface; the light source component, the light emitted by the light source component is reflected by the reflector and then enters the light guide plate from the light incident surface of the light guide plate;
  • the back frame is disposed on the bottom surface side of the light guide plate; wherein: the reflector is close to the light from the back frame One end of the surface extends along a direction close to the light incident surface; the end of the reflector abuts the edge where the light incident surface of the light guide plate meets the light exit surface; and the surface of the reflector facing the light source assembly is provided with a specular reflection sheet or Metal plating.
  • the reflector is a flat plate structure, and the angle between the reflector and the horizontal direction ranges from 20 degrees to 70 degrees.
  • a backlight module including: a light guide plate including a light incident surface, a light emitting surface that is in contact with the light incident surface, and a light emitting surface The bottom surface; the light source component, the light emitted by the light source component is reflected by the reflector and then incident into the light guide plate from the light incident surface of the light guide plate; the back frame is disposed on the bottom surface side of the light guide plate; wherein: the reflector is close to the back frame One end of the smooth surface is formed to extend in a direction close to the light incident surface.
  • the back frame includes a heat dissipating member and a back plate; the heat dissipating member is disposed on a bottom surface side of the light guide plate; the back plate is disposed on a bottom surface side of the heat dissipating member for carrying the light guide plate, the light source assembly and the heat dissipating member; wherein the heat dissipating member comprises a main body portion connected to the reflector, the main body portion being disposed in parallel with a bottom surface of the light guide plate, the main body portion being provided with a receiving portion for accommodating the light source assembly, the receiving portion having a side portion abutting against a side wall of the back plate, the reflector body The side portion is bent and extended in a direction close to the light incident surface.
  • the heat dissipating member is extruded by aluminum, and the main body portion and the reflector are integrally formed.
  • the back frame includes a heat dissipating member and a back plate; the heat dissipating member is disposed on a bottom surface side of the light guide plate; the back plate is disposed on a bottom surface side of the heat dissipating member for carrying the light guide plate, the light source assembly and the heat dissipating member; wherein the heat dissipating member is One end of the light incident surface adjacent to the light guide plate is provided with a receiving portion for accommodating the light source assembly; the back plate has a main body portion disposed in parallel with the bottom surface of the heat dissipating member and a side wall perpendicularly disposed with the main body portion, and the reflector body is along the side wall It bends and extends in the direction close to the entrance surface.
  • the main body portion, the side wall and the reflector are integrally formed.
  • the light source assembly includes a circuit board and an LED unit; the circuit board is closely disposed on the bottom of the accommodating portion, and the LED unit is disposed on the surface of the circuit board.
  • the end of the reflector abuts on the edge of the light incident surface of the light guide plate and the light exit surface.
  • the surface of the reflector facing the light source component is provided with a specular reflection sheet or a metal plating layer.
  • the reflector is a flat plate structure, and the angle between the reflector and the horizontal direction ranges from 20 degrees to 70 degrees.
  • a liquid crystal display device including a liquid crystal display panel and a backlight module that provides a light source for the liquid crystal display panel, wherein the backlight module includes: a light guide plate.
  • the light-incident surface the light-emitting surface that is connected to the light-incident surface, and the bottom surface that is opposite to the light-emitting surface; the light source component, the light emitted by the light source component is reflected by the reflector, and is incident on the light-guide surface of the light guide plate into the light guide plate;
  • the frame is disposed on a bottom surface side of the light guide plate; the reflector is formed by an end of the back frame adjacent to the light incident surface extending in a direction close to the light incident surface.
  • the back frame includes a heat dissipating member and a back plate; the heat dissipating member is disposed on a bottom surface side of the light guide plate; the back plate is disposed on a bottom surface side of the heat dissipating member for carrying the light guide plate, the light source assembly and the heat dissipating member; wherein the heat dissipating member comprises a main body portion connected to the reflector, the main body portion being disposed in parallel with a bottom surface of the light guide plate, the main body portion being provided with a receiving portion for accommodating the light source assembly, the receiving portion having a side portion abutting against a side wall of the back plate, the reflector body The side portion is bent and extended in a direction close to the light incident surface.
  • the heat dissipating member is extruded by aluminum, and the main body portion and the reflector are integrally formed.
  • the back frame includes a heat dissipating member and a back plate; the heat dissipating member is disposed on a bottom surface side of the light guide plate; the back plate is disposed on a bottom surface side of the heat dissipating member for carrying the light guide plate, the light source assembly and the heat dissipating member; wherein the heat dissipating member is One end of the light incident surface adjacent to the light guide plate is provided with a receiving portion for accommodating the light source assembly; the back plate has a main body portion disposed in parallel with the bottom surface of the heat dissipating member and a side wall perpendicularly disposed with the main body portion, and the reflector body is along the side wall It bends and extends in the direction close to the entrance surface.
  • the main body portion, the side wall and the reflector are integrally formed.
  • the light source assembly includes a circuit board and an LED unit; the circuit board is closely disposed on the bottom of the accommodating portion, and the LED unit is disposed on the surface of the circuit board.
  • the end of the reflector abuts on the edge of the light incident surface of the light guide plate and the light exit surface.
  • the surface of the reflector facing the light source component is provided with a specular reflection sheet or a metal plating layer.
  • the reflector is a flat plate structure, and the angle between the reflector and the horizontal direction ranges from 20 degrees to 70 degrees.
  • the invention has the beneficial effects that the backlight module and the liquid crystal display device of the present invention extend from the end of the back frame adjacent to the light incident surface of the light guide plate to form a reflector in a direction close to the light incident surface, which is different from the prior art.
  • the reflector, the light guide plate and the back frame are combined to form a reflection cavity, and the structure is simple, and the reflector does not directly bear the weight of other components of the backlight module, is not easy to be deformed, can enhance the stability of the optical component, and improve the light source component and the guide.
  • the light coupling efficiency of the light panel since the reflector is extended by the back frame, the number of parts is reduced, and cost is saved.
  • FIG. 1 is a schematic structural view of a backlight module of the prior art
  • FIG. 2 is a schematic structural view of a first embodiment of a backlight module of the present invention
  • FIG. 3 is a schematic structural view of a second embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a third embodiment of a backlight module of the present invention.
  • FIG. 2 is a schematic structural view of a first embodiment of a backlight module of the present invention.
  • Embodiments of the present invention include a light guide plate 21, a reflective layer 22, a back frame 23, a light source assembly 24, and an optical film assembly 25.
  • the optical film assembly 25, the light guide plate 21, the reflective layer 22, and the back frame 23 are disposed in this order from top to bottom. in particular:
  • the light guide plate 21 includes a light incident surface 210, a light exit surface 211 that is in contact with the light incident surface 210, and a bottom surface 212 that is opposite to the light exit surface 211.
  • the reflective layer 22 is disposed on one side of the bottom surface 212 of the light guide plate 21 for reflecting light incident on the bottom surface 212 through the light incident surface 210 of the light guide plate 21, and is reflected and emitted from the light exit surface 211 to improve light. Utilization rate.
  • the back frame 23 is disposed on one side of the bottom surface 212 of the light guide plate 21 and below the reflective layer 22.
  • the back frame 23 further includes a reflector 230 formed by an end of the back frame 23 adjacent to the light incident surface 210 of the light guide plate 21 extending in a direction close to the light incident surface 210.
  • the light emitted from the light source unit 24 is reflected by the reflector 230 and enters the light guide plate 21 from the light incident surface 210 of the light guide plate 21.
  • the optical film assembly 25 is, for example, an optical diffusion sheet and an optical brightness enhancement sheet, and is disposed on the surface of the light-emitting surface 211 of the light guide plate 21, and is mainly used for uniformly scattering light transmitted through the light-emitting surface 211 of the light guide plate 21.
  • the end of the reflector 230 abuts on the edge where the light incident surface 210 of the light guide plate 21 and the light exit surface 211 meet.
  • the surface of the reflector 230 facing the light source assembly 24 may further be provided with a reflection enhancing unit 2301, such as a specular reflection sheet or a metal reflective layer or the like having a high reflectivity for enhancing the reflection of the reflector 230. Reflectivity.
  • the reflector 230, the light guide plate 21 and the back frame 23 form a reflection cavity (not shown). Because the reflection cavity has a high sealing property, the light emitted by the light source assembly 24 is conducted in the reflection cavity and escapes. The light of the reflecting cavity is negligible, and the coupling efficiency of the light source assembly 24 and the light guide plate 21 can be greatly improved.
  • the reflector 230 may be a flat plate structure, and the bending angle of the reflector 230, that is, the angle between the reflector 230 and the horizontal direction ranges from 20 degrees to 70 degrees, preferably 30 degrees, 45 degrees. Degree or 60 degrees.
  • an end of the light incident surface 210 of the back frame 23 adjacent to the light guide plate 21 extends in a direction close to the light incident surface 210 to form a reflector 230.
  • the reflector 230, the light guide plate 21 and the back frame 21 form a reflection.
  • the cavity has a simple structure, and the reflector 230 does not directly carry the weight of other components of the backlight module, is not easily deformed, can enhance the stability of the optical component, and improve the coupling efficiency of the light source component 24 and the light guide plate 21.
  • the reflector 230 since the reflector 230 is extended by the back frame 23, the number of parts is reduced, and cost is saved.
  • FIG. 3 is a schematic structural view of a second embodiment of a backlight module of the present invention.
  • the second embodiment of the present invention includes a light guide plate 31, a reflective layer 32, a back frame 33, a light source assembly 34, and an optical film assembly 35 which are similar in structure and function to the first embodiment of the present invention.
  • the back frame 33 further includes a heat sink 331 and a back plate 332.
  • the heat sink 331 is disposed on one side of the bottom surface 312 of the light guide plate 31.
  • the back plate 332 is disposed on the bottom surface side of the heat sink 331 for carrying the light guide plate 31, the heat sink 331 and the light source assembly 34.
  • the heat sink 331 further includes a main body portion 3310 connected to the reflector 330.
  • the main body portion 3310 is disposed in parallel with the bottom surface 312 of the light guide plate 31.
  • the main body portion 3310 is provided with a receiving portion 3311 for accommodating the light source assembly.
  • the receiving portion 3311 has a receiving portion 3311.
  • the side portion 3312 abutting against the side wall of the back plate 332 and the reflector 330 are bent and extended from the side portion 3312 in a direction close to the light incident surface 310 of the light guide plate 31.
  • the surface of the reflector 330 facing the light source assembly 34 is provided with a reflection enhancing unit 3301 which is a reflecting surface having a high reflectivity such as a specular reflection sheet or a metal plating layer.
  • the heat sink 331 is extruded from aluminum, and the body portion 3310 of the heat sink 331 is integrally formed with the reflector 330.
  • the heat dissipating member 331 can also be made of other metal materials or aluminum alloy materials, such as a copper material for the metal material.
  • the light source assembly 34 further includes a circuit board 341 and an LED unit 342.
  • the circuit board 341 is disposed on the bottom of the accommodating portion 3311, and the LED unit 342 is disposed on the surface of the circuit board 341.
  • the backlight module of the embodiment of the present invention can be assembled with the liquid crystal display panel 38 by the fixing and supporting functions provided by the iron frame 36 and the plastic frame 37 to form a liquid crystal display device.
  • the reflector 330 is formed from the main body portion 3310 of the heat sink 331 of the back frame 33, and is integrally formed with the main body portion 3310.
  • the structure is simple, and the reflector 330 does not directly carry the weight of other components of the backlight module.
  • the deformation is not easily generated, the stability of the optical component can be enhanced, and the coupling efficiency of the light source component 34 and the light guide plate 31 can be improved.
  • the reflector 330 is extended by the heat sink 331, the number of parts is reduced, cost is saved, and heat dissipation efficiency can be improved.
  • FIG. 4 is a schematic structural view of a third embodiment of a backlight module of the present invention.
  • the third embodiment of the present invention includes a light guide plate 41, a reflective layer 42, a back frame 43, a light source assembly 44, and an optical film assembly 45 which are similar in structure and function to the first embodiment of the present invention.
  • the back frame 43 further includes a heat sink 431 and a back plate 432.
  • the heat sink 431 is disposed on one side of the bottom surface 412 of the light guide plate 41.
  • the back plate 432 is disposed on the bottom surface side of the heat sink 431 for carrying the light guide plate 41, the heat sink 431, and the light source assembly 44. Further, the heat dissipating member 431 is provided at a position close to the light incident surface 410 of the light guide plate 41 with a receiving portion 4311 for accommodating the light source unit 44.
  • the back plate 432 has a main body portion 4320 disposed in parallel with the bottom surface of the heat dissipating member 431 and a side wall 4321 disposed perpendicularly to the main body portion 4320.
  • the reflector 430 is bent from the side wall 4321 in a direction close to the light incident surface 410 of the light guide plate 41. extend.
  • the reflector 430 may be a flat plate structure, and the bending angle of the reflector 430, that is, the angle between the reflector 430 and the horizontal direction ranges from 20 degrees to 70 degrees, preferably 30 degrees, 45 degrees. Degree or 60 degrees.
  • the surface of the reflector 430 facing the light source assembly 44 is provided with a reflection enhancing unit 4301 which is a reflecting surface having a high reflectivity such as a specular reflection sheet or a metal plating layer.
  • the main body portion 4320, the side wall 4321, and the reflector 430 of the back plate 432 are integrally formed.
  • the light source assembly 44 includes a circuit board 441 and an LED unit 442.
  • the circuit board 441 is disposed on the bottom of the accommodating portion 4311, and the LED unit 442 is disposed on the surface of the circuit board 441.
  • the backlight module of the embodiment of the present invention can be assembled with the liquid crystal display panel 48 by the fixing and supporting functions provided by the iron frame 46 and the plastic frame 47 to form a liquid crystal display device.
  • the reflector 430 is formed from the sidewall 4321 of the backing plate 432, and is integrally formed with the reflector 430, the sidewall 4321, and the main body 4320.
  • the structure is simple, and the reflector 430 does not directly carry the backlight module.
  • the weight of the component is not easily deformed, the stability of the optical component can be enhanced, and the coupling efficiency of the light source component 44 and the light guide plate 41 can be improved.
  • the reflector 430 is extended by the back plate 432, the number of parts is reduced, and cost is saved.
  • the present invention also provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal display panel and a backlight module that provides a light source for the liquid crystal display panel.
  • the backlight module is the backlight module described in any of the above embodiments.
  • the number of the reflectors may include a plurality of reflectors, such as the reflectors described above, where the light incident surface of the front, rear, left, and right sides of the light guide plate and the light exit surface meet.
  • the reflector is formed by the end of the back frame adjacent to the light incident surface of the light guide plate extending along the direction of the light incident surface, and the structure and working principle are the reflectors described in the above embodiments. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组及液晶显示装置。该背光模组包括:导光板(21),其包括入光面(210)、与入光面(210)相接的出光面(211)以及与出光面(211)相对设置的底面(212);光源组件(24),光源组件(24)发出的光线经反射体(230)反射后自导光板(21)的入光面(210)入射至导光板(21)中;背框架(23),设置在导光板(21)的底面(212)一侧;反射体(230)由背框架(23)靠近入光面(210)的一端沿着靠近入光面(210)的方向延伸形成。该背光模组能够节省材料、增强光学部件的稳定性,提高光源组件(24)与导光板(21)间的耦光效率。

Description

背光模组及液晶显示装置
【技术领域】
本发明涉及液晶显示技术领域,特别是涉及一种背光模组及液晶显示装置。
【背景技术】
如图1所示,现有技术中,一种底面入光式的背光模组包括:导光板11、铝挤12、背板13、反射体14、光源组件15以及光学薄膜16。其中,反射体14设置在胶框17面向光源组件15出光方向的表面上,光源组件15收容于铝挤12上的容置部(未标示),光源组件15发出的光经过反射体14反射后入射至导光板11中。
由于胶框17一般采用塑胶材料,而塑胶材料受力易变形,从而会导致其上贴附的反射体14容易从胶框17表面脱落,造成光源组件15与导光板11间的耦光效率下降。
因此,有必要提供一种背光模组及液晶显示装置以解决上述技术问题。
【发明内容】
本发明主要解决的技术问题是提供一种背光模组及液晶显示装置,能够增强光学部件的稳定性,提高光源组件与导光板之间的耦光效率。
为解决上述技术问题,本发明采用的一个技术方案是:提供一种背光模组,其包括:导光板,其包括入光面、与入光面相接的出光面以及与出光面相对设置的底面;光源组件,光源组件发出的光线经反射体反射后自导光板的入光面入射至导光板中;背框架,设置在导光板的底面一侧;其中:反射体由背框架靠近入光面的一端沿着靠近入光面的方向延伸形成;反射体的末端抵接于导光板的入光面和出光面相接处的边沿;并且反射体面向光源组件的表面设置有镜面反射片或者金属镀层。
其中,反射体是平板结构,并且反射体与水平方向夹角的范围为20度到70度。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种背光模组,其包括:导光板,其包括入光面、与入光面相接的出光面以及与出光面相对设置的底面;光源组件,光源组件发出的光线经反射体反射后自导光板的入光面入射至导光板中;背框架,设置在导光板的底面一侧;其中:反射体由背框架靠近入光面的一端沿着靠近入光面的方向延伸形成。
其中,背框架包括散热件和背板;散热件设置在导光板的底面一侧;背板设置在散热件的底面一侧,用于承载导光板、光源组件和散热件;其中,散热件包括与反射体连接的主体部,主体部与导光板的底面平行设置,主体部设置有用于收容光源组件的容置部,容置部具有与背板的侧壁抵接的侧部,反射体自侧部沿着靠近入光面的方向弯折延伸。
其中,散热件是铝挤,且主体部和反射体一体成型。
其中,背框架包括散热件和背板;散热件设置在导光板的底面一侧;背板设置在散热件的底面一侧,用于承载导光板、光源组件和散热件;其中,散热件在靠近导光板的入光面的一端设置有用于收容光源组件的容置部;背板具有与散热件的底面平行设置的主体部以及和主体部垂直设置的侧壁,反射体自侧壁沿着靠近入光面的方向弯折延伸。
其中,主体部、侧壁和反射体一体成型。
其中,光源组件包括电路板和LED单元;电路板紧贴设置于容置部的底部,LED单元设置于电路板的表面。
其中,反射体的末端抵接于导光板的入光面和出光面相接处的边沿。
其中,反射体面向光源组件的表面设置有镜面反射片或者金属镀层。
其中,反射体是平板结构,并且反射体与水平方向夹角的范围为20度到70度。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种液晶显示装置,包括液晶显示面板和为液晶显示面板提供光源的背光模组,其中:背光模组包括:导光板,其包括入光面、与入光面相接的出光面以及与出光面相对设置的底面;光源组件,光源组件发出的光线经反射体反射后自导光板的入光面入射至导光板中;背框架,设置在导光板的底面一侧;反射体由背框架靠近入光面的一端沿着靠近入光面的方向延伸形成。
其中,背框架包括散热件和背板;散热件设置在导光板的底面一侧;背板设置在散热件的底面一侧,用于承载导光板、光源组件和散热件;其中,散热件包括与反射体连接的主体部,主体部与导光板的底面平行设置,主体部设置有用于收容光源组件的容置部,容置部具有与背板的侧壁抵接的侧部,反射体自侧部沿着靠近入光面的方向弯折延伸。
其中,散热件是铝挤,且主体部和反射体一体成型。
其中,背框架包括散热件和背板;散热件设置在导光板的底面一侧;背板设置在散热件的底面一侧,用于承载导光板、光源组件和散热件;其中,散热件在靠近导光板的入光面的一端设置有用于收容光源组件的容置部;背板具有与散热件的底面平行设置的主体部以及和主体部垂直设置的侧壁,反射体自侧壁沿着靠近入光面的方向弯折延伸。
其中,主体部、侧壁和反射体一体成型。
其中,光源组件包括电路板和LED单元;电路板紧贴设置于容置部的底部,LED单元设置于电路板的表面。
其中,反射体的末端抵接于导光板的入光面和出光面相接处的边沿。
其中,反射体面向光源组件的表面设置有镜面反射片或者金属镀层。
其中,反射体是平板结构,并且反射体与水平方向夹角的范围为20度到70度。
本发明的有益效果是:区别于现有技术的情况,本发明背光模组及液晶显示装置,从背框架靠近导光板的入光面的一端沿靠近入光面的方向延伸形成反射体,该反射体、导光板以及背框架围合成一反射腔,结构简单,且反射体不直接承载背光模组其它零部件的重量,不容易产生形变,能够增强光学部件的稳定性,提高光源组件与导光板的耦光效率。另外,因为反射体由背框架延伸而成,减少零件数量,节约成本。
【附图说明】
图1是现有技术背光模组的结构示意图;
图2是本发明背光模组第一实施例的结构示意图;
图3是本发明背光模组第二实施例的结构示意图;
图4是本发明背光模组第三实施例的结构示意图。
【具体实施方式】
下面结合说明书附图和具体实施例对本发明进行详细说明。
参阅图2,图2是本发明背光模组第一实施例的结构示意图。本发明实施例包括:导光板21、反射层22、背框架23、光源组件24以及光学薄膜组件25。其中,光学薄膜组件25、导光板21、反射层22以及背框架23自上而下依次设置。具体而言:
导光板21,其包括入光面210、与入光面210相接的出光面211以及与出光面211相对设置的底面212。
反射层22,设置在导光板21的底面212的一侧,用于对经导光板21的入光面210入射至底面212的光线进行反射,经反射后从出光面211射出,以提高光线的利用率。
背框架23,设置在导光板21的底面212的一侧且位于反射层22下方。背框架23进一步包括反射体230,反射体230由背框架23靠近导光板21的入光面210的一端沿着靠近入光面210的方向延伸形成。
光源组件24发出的光线经反射体230反射后自导光板21的入光面210入射至导光板21中。
光学薄膜组件25例如为光学扩散片和光学增亮片,其设置于导光板21的出光面211的表面,主要用于对导光板21的出光面211透射出的光线进行均匀散射。
值得注意的是,在本实施方式中,反射体230的末端抵接于导光板21的入光面210和出光面211相接处的边沿。并且,反射体230面向光源组件24的表面可进一步设置有反射增强单元2301,该反射增强单元2301例如是镜面反射片或者金属镀层等具有高反射率的反射面,用以增强反射体230对光的反射率。
由上述结构可知,反射体230、导光板21以及背框架23形成一反射腔(未标示),因为该反射腔具有较高的密封性,光源组件24发出的光线在反射腔内传导,逸出反射腔的光线可忽略不计,能够极大提高光源组件24与导光板21的耦光效率。
在上述实施例中,反射体230可以是平板结构,并且反射体230的弯折角度,即:反射体230与水平方向之间夹角的范围为20度到70度,优选为30度、45度或60度。
本发明实施例,从背框架23靠近导光板21的入光面210的一端沿靠近入光面210的方向延伸形成反射体230,该反射体230、导光板21以及背框架21围合成一反射腔,结构简单,且反射体230不直接承载背光模组其它零部件的重量,不容易产生形变,能够增强光学部件的稳定性,提高光源组件24与导光板21的耦光效率。另外,因为反射体230由背框架23延伸而成,减少零件数量,节约成本。
请参阅图3,图3是本发明背光模组第二实施例的结构示意图。本发明第二实施例包括与本发明第一实施例结构和功能相近的导光板31、反射层32、背框架33、光源组件34以及光学薄膜组件35。其中,背框架33进一步包括散热件331和背板332。
散热件331设置在导光板31的底面312的一侧,背板332设置在散热件331的底面一侧,用于承载导光板31、散热件331和光源组件34。
散热件331进一步包括与反射体330连接的主体部3310,主体部3310与导光板31的底面312平行设置,主体部3310设置有用于***述光源组件的容置部3311,容置部3311具有与背板332的侧壁抵接的侧部3312,反射体330自侧部3312沿着靠近导光板31的入光面310的方向弯折延伸。当然,反射体330面向光源组件34的表面设置有反射增强单元3301,该反射增强单元3301是镜面反射片或者金属镀层等具有高反射率的反射面。
在一优选实施方式中,散热件331是铝挤,散热件331的主体部3310与反射体330一体成型。当然,视具体需求,该散热件331还可以采用其它金属材料或铝合金材料,如金属材料采用铜片。
其中,光源组件34还进一步包括电路板341和LED单元342,电路板341紧贴设置于容置部3311的底部,LED单元342设置于电路板341的表面。
应理解,本发明实施例的背光模组可通过铁框36和胶框37提供的固定和支撑作用,实现和液晶显示面板38的组立,以形成一液晶显示装置。
本发明实施例,反射体330从背框架33的散热件331的主体部3310上延伸形成,且与主体部3310一体成型,结构简单,且反射体330不直接承载背光模组其它零部件的重量,不容易产生形变,能够增强光学部件的稳定性,提高光源组件34与导光板31的耦光效率。另外,因为反射体330由散热件331延伸而成,减少零件数量,节约成本,并能够提高散热效率。
参阅图4,图4是本发明背光模组第三实施例的结构示意图。本发明第三实施例包括与本发明第一实施例结构和功能相近的导光板41、反射层42、背框架43、光源组件44以及光学薄膜组件45。其中,背框架43进一步包括散热件431和背板432。
散热件431设置在导光板41的底面412的一侧,背板432设置在散热件431的底面一侧,用于承载导光板41、散热件431和光源组件44。并且,散热件431在靠近导光板41的入光面410的一端设置有用于收容光源组件44的容置部4311。
背板432具有与散热件431的底面平行设置的主体部4320以及和主体部4320垂直设置的侧壁4321,反射体430自侧壁4321沿着靠近导光板41的入光面410的方向弯折延伸。
在上述实施例中,反射体430可以是平板结构,并且反射体430的弯折角度,即:反射体430与水平方向之间夹角的范围为20度到70度,优选为30度、45度或60度。
当然,反射体430面向光源组件44的表面设置有反射增强单元4301,该反射增强单元4301是镜面反射片或者金属镀层等具有高反射率的反射面。
其中,背板432的主体部4320、侧壁4321和反射体430一体成型。
光源组件44包括电路板441和LED单元442,该电路板441紧贴设置于容置部4311的底部,LED单元442设置于电路板441的表面。
应理解,本发明实施例的背光模组可通过铁框46和胶框47提供的固定和支撑作用,实现和液晶显示面板48的组立,以形成一液晶显示装置。
本发明实施例,反射体430从背板432的侧壁4321上延伸形成,且与反射体430、侧壁4321以及主体部4320一体成型,结构简单,且反射体430不直接承载背光模组其它零部件的重量,不容易产生形变,能够增强光学部件的稳定性,提高光源组件44与导光板41的耦光效率。另外,因为反射体430由背板432延伸而成,减少零件数量,节约成本。
本发明还提供一种液晶显示装置。该液晶显示装置包括液晶显示面板和为所述液晶显示面板提供光源的背光模组,该背光模组是上述任一实施例所述的背光模组。
上述实施例中,反射体的数量可以包括多个,即可以前、后、左、右四面的导光板的入光面和出光面相接处的地方均设置如上所述的反射体,其共同点为该反射体由背框架靠近导光板的入光面的一端沿着靠近入光面的方向延伸形成,其结构和工作原理如上述实施例所述的反射体,此处不再一一赘述。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种背光模组,其包括:
    导光板,其包括入光面、与所述入光面相接的出光面以及与所述出光面相对设置的底面;
    光源组件,所述光源组件发出的光线经反射体反射后自所述导光板的入光面入射至所述导光板中;
    背框架,设置在所述导光板的底面一侧;
    其中:
    所述反射体由所述背框架靠近所述入光面的一端沿着靠近所述入光面的方向延伸形成;所述反射体的末端抵接于所述导光板的入光面和出光面相接处的边沿;并且所述反射体面向所述光源组件的表面设置有镜面反射片或者金属镀层。
  2. 根据权利要求1所述的背光模组,其中:
    所述反射体是平板结构,并且所述反射体与水平方向夹角的范围为20度到70度。
  3. 一种背光模组,其包括:
    导光板,其包括入光面、与所述入光面相接的出光面以及与所述出光面相对设置的底面;
    光源组件,所述光源组件发出的光线经反射体反射后自所述导光板的入光面入射至所述导光板中;
    背框架,设置在所述导光板的底面一侧;
    其中:
    所述反射体由所述背框架靠近所述入光面的一端沿着靠近所述入光面的方向延伸形成。
  4. 根据权利要求3所述的背光模组,其中:
    所述背框架包括散热件和背板;
    所述散热件设置在所述导光板的底面一侧;
    所述背板设置在所述散热件的底面一侧,用于承载所述导光板、所述光源组件和所述散热件;
    其中,所述散热件包括与所述反射体连接的主体部,所述主体部与所述导光板的所述底面平行设置,所述主体部设置有用于***述光源组件的容置部,所述容置部具有与所述背板的侧壁抵接的侧部,所述反射体自所述侧部沿着靠近所述入光面的方向弯折延伸。
  5. 根据权利要求4所述的背光模组,其中:
    所述散热件是铝挤,且所述主体部和所述反射体一体成型。
  6. 根据权利要求3所述的背光模组,其中:
    所述背框架包括散热件和背板;
    所述散热件设置在所述导光板的底面一侧;
    所述背板设置在所述散热件的底面一侧,用于承载所述导光板、所述光源组件和所述散热件;
    其中,所述散热件在靠近所述导光板的入光面的一端设置有用于***述光源组件的容置部;
    所述背板具有与所述散热件的底面平行设置的主体部以及和所述主体部垂直设置的侧壁,所述反射体自所述侧壁沿着靠近所述入光面的方向弯折延伸。
  7. 根据权利要求6所述的背光模组,其中:
    所述主体部、所述侧壁和所述反射体一体成型。
  8. 根据权利要求6所述的背光模组,其中:
    所述光源组件包括电路板和LED单元;
    所述电路板紧贴设置于所述容置部的底部,所述LED单元设置于所述电路板的表面。
  9. 根据权利要求3所述的背光模组,其中:
    所述反射体的末端抵接于所述导光板的入光面和出光面相接处的边沿。
  10. 根据权利要求3所述的背光模组,其中:
    所述反射体面向所述光源组件的表面设置有镜面反射片或者金属镀层。
  11. 根据权利要求3所述的背光模组,其中:
    所述反射体是平板结构,并且所述反射体与水平方向夹角的范围为20度到70度。
  12. 一种液晶显示装置,包括液晶显示面板和为所述液晶显示面板提供光源的背光模组,其中:
    所述背光模组包括:
    导光板,其包括入光面、与所述入光面相接的出光面以及与所述出光面相对设置的底面;
    光源组件,所述光源组件发出的光线经反射体反射后自所述导光板的入光面入射至所述导光板中;
    背框架,设置在所述导光板的底面一侧;
    所述反射体由所述背框架靠近所述入光面的一端沿着靠近所述入光面的方向延伸形成。
  13. 根据权利要求12所述的液晶显示装置,其中:
    所述背框架包括散热件和背板;
    所述散热件设置在所述导光板的底面一侧;
    所述背板设置在所述散热件的底面一侧,用于承载所述导光板、所述光源组件和所述散热件;
    其中,所述散热件包括与所述反射体连接的主体部,所述主体部与所述导光板的所述底面平行设置,所述主体部设置有用于***述光源组件的容置部,所述容置部具有与所述背板的侧壁抵接的侧部,所述反射体自所述侧部沿着靠近所述入光面的方向弯折延伸。
  14. 根据权利要求13所述的液晶显示装置,其中:
    所述散热件是铝挤,且所述主体部和所述反射体一体成型。
  15. 根据权利要求12所述的液晶显示装置,其中:
    所述背框架包括散热件和背板;
    所述散热件设置在所述导光板的底面一侧;
    所述背板设置在所述散热件的底面一侧,用于承载所述导光板、所述光源组件和所述散热件;
    其中,所述散热件在靠近所述导光板的入光面的一端设置有用于***述光源组件的容置部;
    所述背板具有与所述散热件的底面平行设置的主体部以及和所述主体部垂直设置的侧壁,所述反射体自所述侧壁沿着靠近所述入光面的方向弯折延伸。
  16. 根据权利要求15所述的液晶显示装置,其中:
    所述主体部、所述侧壁和所述反射体一体成型。
  17. 根据权利要求15所述的液晶显示装置,其中:
    所述光源组件包括电路板和LED单元;
    所述电路板紧贴设置于所述容置部的底部,所述LED单元设置于所述电路板的表面。
  18. 根据权利要求12所述的液晶显示装置,其中:
    所述反射体的末端抵接于所述导光板的入光面和出光面相接处的边沿。
  19. 根据权利要求12所述的液晶显示装置,其中:
    所述反射体面向所述光源组件的表面设置有镜面反射片或者金属镀层。
  20. 根据权利要求12所述的液晶显示装置,其中:
    所述反射体是平板结构,并且所述反射体与水平方向夹角的范围为20度到70度。
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