WO2013149405A1 - 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
WO2013149405A1
WO2013149405A1 PCT/CN2012/073705 CN2012073705W WO2013149405A1 WO 2013149405 A1 WO2013149405 A1 WO 2013149405A1 CN 2012073705 W CN2012073705 W CN 2012073705W WO 2013149405 A1 WO2013149405 A1 WO 2013149405A1
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WIPO (PCT)
Prior art keywords
reflective
light emitting
optical film
light source
reflective surface
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Ceased
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PCT/CN2012/073705
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English (en)
French (fr)
Inventor
方扩军
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/511,702 priority Critical patent/US9116388B2/en
Publication of WO2013149405A1 publication Critical patent/WO2013149405A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module and a liquid crystal display.
  • FIG. 1 is a schematic top plan view of a backlight module of the prior art.
  • the backlight module includes an optical film 11 and a light source 12, and the light source 12 can be evenly disposed on one side or a plurality of sides of the optical film 11 according to actual optical requirements.
  • the manner of setting the light source 12 requires using more light sources 12, which not only increases the cost, but also the plurality of light sources 12 are arranged side by side on the side of the optical film 11, occupying a large space, so that the length or width of the backlight module is increased. , limiting the trend of the narrow side of the backlight module.
  • the prior art light source 12 such as a light emitting diode (Light Emitting) Diode, LED), usually one or two LEDs can meet the specifications of the luminous flux of the backlight module.
  • a light emitting diode Light Emitting Diode, LED
  • An object of the present invention is to provide a backlight module, which can reduce the number of light sources, reduce the cost, and save space by reasonably setting the light source, and can also ensure the specification of the luminous flux of the backlight module.
  • Another object of the present invention is to provide a liquid crystal display with a reasonable arrangement of light sources, which reduces the number of light sources, reduces cost, and saves space, and at the same time ensures the specification of the luminous flux of the backlight module.
  • the invention constructs a backlight module, which can reasonably set the light source, reduce the number of light sources, reduce the cost and save space, and at the same time ensure the specification of the luminous flux of the backlight module.
  • the present invention constructs a backlight module comprising an optical film, a reflector and two light-emitting components, the light-emitting component comprising a light source and a reflector, the light source being elongated;
  • the reflector Located below the optical film and disposed opposite to the optical film, the reflective member comprises a reflective body and a reflective surface on a top surface of the reflective body, the reflective surface comprising a plurality of sides, wherein:
  • the light emitting component is disposed at an intersection formed by a plurality of side edges of the reflective surface, and a light emitting direction of the light emitting component faces the reflective surface;
  • the reflective surface is designed as a free curved surface having a predetermined trajectory, and light emitted from the illuminating component can enter the reflective surface and be uniformly reflected into the optical film after being reflected by the reflective surface.
  • the light source includes a light emitting surface that is parallel to the optical film and faces the reflective cover and the reflective surface; the reflective cover is used to light the light from the light source Reflected to the reflective surface or the optical film.
  • the planar surface of the reflecting surface has a square shape, and includes two parallel sides and two parallel sides which are relatively parallel, and the four sides form four intersections;
  • the two light emitting components are respectively disposed at two opposite intersections of the four intersections.
  • a vertical plane of the light emitting surface of the light source is perpendicular to the reflective member; the vertical plane forms an incident angle with the short side of the reflective surface, and the incident clip The angle ranges from 0 to ⁇ /2; the length of the short side has a ratio to the length of the long side;
  • the incident angle increases as the ratio increases.
  • any point on the reflective surface has a vertical distance from the vertical plane; any point on the reflective surface has a height relative to a bottom surface of the reflective member, wherein the reflective surface
  • the height of any point decreases as its vertical distance to the vertical plane increases. At a position close to the light source, the height decreases more, and at a position away from the light source, the height decreases slowly. .
  • Another object of the present invention is to provide a backlight module that can accurately set the light source, reduce the number of light sources, reduce cost, and save space, and at the same time ensure the specification of the luminous flux of the backlight module.
  • the present invention constructs a backlight module including an optical film, a reflective member and at least one light emitting component, the reflective member being located below the optical film and disposed opposite to the optical film
  • the reflective member includes a reflective body and a reflective surface on a top surface of the reflective body, the reflective surface including a plurality of sides;
  • the light emitting component is disposed at one of the intersections formed by the plurality of sides of the reflective surface, and the light emitting direction of the light emitting component faces the reflective surface; the reflective surface is designed to have a preset The free curved surface of the trajectory, the light emitted from the illuminating component can enter the reflecting surface, and is reflected by the reflecting surface to uniformly enter the optical film.
  • the light emitting assembly includes a light source and a reflective cover;
  • the light source includes a light emitting surface that is parallel to the optical film and faces the reflective cover and the reflective surface;
  • the reflection A cover is used to reflect light from the source to the reflective surface or the optical film.
  • the planar plan view of the reflective surface is square, including two parallel sides and two parallel sides that are relatively parallel, and the four sides form four intersections; the backlight mode
  • the set includes two lighting assemblies that are disposed at two of the opposite intersections of the four intersections.
  • the light source is elongated, wherein a vertical plane of the light emitting surface is perpendicular to the reflective member; and the vertical plane is incident with a short side of the reflective surface.
  • An angle at which the incident angle ranges from 0 to ⁇ /2; the length of the short side has a ratio to the length of the long side; the incident angle increases as the ratio increases .
  • any point on the reflective surface has a vertical distance from the vertical plane; any point on the reflective surface has a height relative to a bottom surface of the reflective member, wherein the reflective surface
  • the height of any point decreases as its vertical distance to the vertical plane increases, while at a position close to the light source, the height decreases more, and at a position away from the light source, the height decreases. slow.
  • the present invention constructs a liquid crystal display comprising a backlight module, the backlight module comprising an optical film, a reflective member and at least one light emitting component, the reflective member being located below the optical film And disposed opposite to the optical film, the reflective member comprises a reflective body and a reflective surface on a top surface of the reflective body, the reflective surface comprising a plurality of sides;
  • the light emitting component is disposed at one of the intersections formed by the plurality of sides of the reflective surface, and the light emitting direction of the light emitting component faces the reflective surface;
  • the reflective surface is designed as a free curved surface having a predetermined trajectory, and light emitted from the illuminating component can enter the reflective surface and be uniformly reflected into the optical film after being reflected by the reflective surface.
  • the light emitting assembly includes a light source and a reflective cover;
  • the light source includes a light emitting surface that is parallel to the optical film and faces the reflective cover and the reflective surface;
  • the reflective cover For reflecting light from the light source to the reflective surface or the optical film.
  • the planar surface of the reflecting surface has a square shape, and includes two parallel sides and two parallel sides which are relatively parallel, and the four sides form four intersections; the backlight module A two lighting assembly is included, the two lighting assemblies being disposed at two opposite intersections of the four intersections.
  • the light source is elongated, wherein a vertical plane of the light emitting surface is perpendicular to the reflecting member; and the vertical plane and the short side of the reflecting surface are an incident clip.
  • An angle at which the incident angle ranges from 0 to ⁇ /2; a length of the short side and a length of the long side have a ratio; the incident angle increases as the ratio increases.
  • any point on the reflecting surface has a vertical distance from the vertical plane; any point on the reflecting surface has a height with respect to a bottom surface of the reflecting member, wherein the reflecting surface
  • the height of a point decreases as its vertical distance to the vertical plane increases, while at a position near the light source, the height decreases more, and at a position away from the light source, the height decreases more slowly.
  • the backlight module and the liquid crystal display of the present invention are arranged by arranging the light-emitting components at the intersection of the sides of the reflecting surface, and setting the reflecting surface according to a preset trajectory, which is located at the intersection of the side edges.
  • the illuminating components cooperate to reflect the light emitted from the illuminating component into the optical film.
  • the number of light-emitting components used in the present invention is small, which reduces cost and space saving, and also ensures the specification of the luminous flux of the backlight module.
  • FIG. 1 is a schematic plan view showing a planar structure of a backlight module in the prior art
  • FIG. 2 is a schematic view showing the positional relationship between a reflector and a light source in a backlight module of the present invention
  • FIG. 3 is a cross-sectional view taken along line AA' of FIG. 2, and further showing the relative positional relationship between the reflector, the light source, the optical film, and the reflector of the backlight module of the present invention in FIG. ;
  • FIG. 4 is a top plan view showing a reflecting surface of a reflector and a light source in a backlight module of the present invention
  • FIG. 5 is a cross-sectional structural view taken along line BB' of FIG. 4, and further shows the positional relationship between the optical film and the reflecting member of the backlight module of the present invention
  • FIG. 6 is a schematic diagram showing a curve of a height and a vertical distance of a point on a reflecting surface of a reflector of a backlight module of the present invention.
  • the backlight module provided by the present invention comprises an optical film 21, a reflector 22 and at least one light-emitting component (not shown), and the light-emitting component comprises a light source 23 and a reflection cover 24 (Fig. 3).
  • the reflector 22 is located below the optical film 21 and is disposed in parallel with the optical film 21.
  • the reflector 22 includes a reflective body 221, a reflective surface 222 on the top surface of the reflective body 222, and a bottom surface 223 on the lower surface of the reflective body 222.
  • FIG. 4 is a top structural view of the reflecting surface 222 and the light source 23.
  • the plane of the reflecting surface 222 is square in plan view, and includes two long sides 224 disposed opposite to each other and two short side edges 225 disposed opposite to each other.
  • FIG. 3 is a cross-sectional view taken along the line AA' of FIG. 2, and the relative positional relationship between the reflector 24, the light source 23, the optical film 21, and the reflector 22 is shown in FIG.
  • the light source 23 includes a light emitting surface 231.
  • the light-emitting surface 231 is parallel to the optical film 21, and the light-emitting surface 231 faces the reflective cover 24 and the reflective surface 222 of the reflector 22.
  • the light-emitting surface 231 may also be at an angle with the optical film 21 as long as the light emitted from the light-emitting surface 231 can be totally directed toward the reflective cover 24 and the reflective surface 222 to achieve brightness. Evenly.
  • the two long sides 224 and the two short sides 225 of the reflecting surface 222 form four intersections, and the light emitting component (only the light source 23 of the light emitting component is shown in FIG. 4) is disposed on the reflecting surface. Two opposite intersections on 222.
  • the light-emitting components can also be disposed at one or more intersections on the reflective surface 222 according to actual optical requirements, so the present invention does not limit the actual number of the light sources 23 and the location of the light source 23. Specific interchange.
  • the light source 23 is elongated, such as a light emitting diode (LED), and a vertical plane M where the light emitting surface 231 is located is perpendicular to the bottom surface 223 of the reflective member 22. Any point on the reflecting surface 222 to the vertical plane M has a vertical distance Ri; any point on the reflecting surface 222 forms a height Di with respect to the bottom surface 223.
  • LED light emitting diode
  • the reflective surface 222 is a free curved surface having a preset trajectory. More specifically, referring to FIG. 2, the preset trajectory has a feature that the height Di of any point on the reflecting surface 222 decreases as its vertical distance Ri to the vertical plane M of the light source increases.
  • FIG. 6 is a schematic diagram showing a variation curve between the vertical distance Ri and the height Di.
  • the rate of change of the height Di gradually decreases. That is, at a position close to the light source 23, the height Di of the reflecting surface 222 tends to decrease, and at a position away from the light source 23, the height Di of the reflecting surface 222 tends to decrease.
  • the incident angle ⁇ and the preset trajectory of the reflective surface 222 cooperate with each other, so that the light entering the reflective surface 222 from the light source 23 is reflected by the reflective surface 222 and uniformly enters the Optical film 21.
  • FIG. 5 is a cross-sectional structural view taken along line BB' of FIG. 2, and FIG. 5 also shows the positional relationship between the optical film 21 and the reflecting member 22.
  • the length of the reflecting member 22 is the length L of the long side 224 of the reflecting surface 222, and the optical film 21 has a length N.
  • the length L is greater than the length N, so that the The light source 23 can be disposed above the reflective surface 222 to facilitate the light of the light source 23 to be directed toward the reflective surface 222.
  • the four sides of the reflecting surface 222 of the reflecting member 22 are formed at four intersections, and the light-emitting components (including the light source 23 and the reflecting cover 24 in FIG. 3) are disposed at opposite intersections thereof. And the light emitting surface 231 of the light source 23 is directed toward the reflective cover 24 and the reflective surface 222.
  • the light source 23 emits light
  • the light emitted from the light source 23 is directed toward the reflector 24 and the reflecting surface 222, and the light entering the reflector 24 is reflected by the reflector 24, and a part of the light enters directly.
  • the optical film 21 (see FIG. 3) is described, and another portion is incident on the reflecting surface 222, and is reflected by the reflecting surface 222 to finally enter the optical film 21.
  • the reflecting surface 222 is a free curved surface having a predetermined trajectory
  • an optical component composed of the reflecting cover 24 and the light source 23 is disposed at one or more intersections of the free curved surface, and thus is directly directed from the light source 23
  • the light of the reflecting surface 222 and the light reflected by the reflecting cover 24 and entering the reflecting surface 222 are reflected by the reflecting surface 222, and then all enter the optical film 21.
  • the present invention can use a smaller number of light sources 23, which not only reduces costs but also saves space.
  • the light source 23 adopts an LED, which ensures the specification of the luminous flux of the backlight module.
  • the present invention also provides a liquid crystal display comprising the backlight module provided by the present invention. Since the backlight module has been described in detail above, it will not be described herein.

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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)
  • Liquid Crystal (AREA)

Description

背光模组及液晶显示器 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器。
 背景技术
随着液晶技术的不断发展，对液晶显示器内各部件的要求越来越高。
请参阅图1，图1为现有技术背光模组的俯视结构示意图。
所述背光模组包括光学膜片11和光源12，光源12可以根据实际的光学需求而均匀的设置在光学膜片11的一条侧边或者多条侧边处，图1所示仅为设置在光学膜片11的一条侧边。
显然，上述设置光源12的方式需要使用较多的光源12，不仅增加成本，而且多个光源12并列排布在光学膜片11的侧边，占用空间大，使得背光模组的长度或者宽度增加，限制了背光模组窄边发展的趋势。
此外，现有技术的光源12，譬如发光二极管（Light Emitting Diode，LED），通常一到两颗LED即可满足背光模组的光通量的规格要求。
因此，如何合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求，是液晶显示技术领域研究的方向之一。
 技术问题
本发明的一个目的在于提供一种背光模组，以合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求。
本发明的另一个目的在于提供一种液晶显示器，以合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求。
 技术解决方案
本发明构造了一种背光模组，以合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求。
为达到上述目的，本发明构造了一种背光模组，包括光学膜片、反射件和两个发光组件，所述发光组件包括光源和反射罩，所述光源为长条形；所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边，其中：
所述发光组件设置于由所述反射面的多条侧边形成的交汇处，且所述发光组件的光线出射方向朝向所述反射面；
所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
在本发明的背光模组中，所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
在本发明的背光模组中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四个交汇处；
所述两个发光组件分别设置于所述四个交汇处的其中两个相对的交汇处。
在本发明的背光模组中，所述光源的发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；
所述入射夹角随着所述比值的增加而增加。
在本发明的背光模组中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
本发明的另一个目的在于提供一种背光模组，以合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求。
为达到上述目的，本发明构造了一种背光模组，包括光学膜片、反射件和至少一个发光组件，所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边；
所述发光组件设置于由所述反射面的多条侧边形成的其中一交汇处，且所述发光组件的光线出射方向朝向所述反射面；所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
在本发明的背光模组中，所述发光组件包括光源和反射罩；所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
在本发明的背光模组中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四处交汇处；所述背光模组包括两个发光组件，这两个发光组件设置于所述四个交汇处的其中两个相对的交汇处。
在本发明的背光模组中，所述光源为长条形，其中所述发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；所述入射夹角随着所述比值的增加而增加。
在本发明的背光模组中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，而在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
本发明的又一个目的在于提供一种液晶显示器，以合理的设置光源，既减少光源的数目，降低成本以及节省空间，同时还能够保证背光模组的光通量的规格要求。
为达到上述目的，本发明构造了一种液晶显示器，包括一背光模组，所述背光模组包括光学膜片、反射件和至少一个发光组件，所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边；
所述发光组件设置于由所述反射面的多条侧边形成的其中一交汇处，且所述发光组件的光线出射方向朝向所述反射面；
所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
在本发明的液晶显示器中，所述发光组件包括光源和反射罩；所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
在本发明的液晶显示器中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四处交汇处；所述背光模组包括两个发光组件，这两个发光组件设置于所述四个交汇处的其中两个相对的交汇处。
在本发明的液晶显示器中，所述光源为长条形，其中所述发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；所述入射夹角随着所述比值的增加而增加。
在本发明的液晶显示器中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，而在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
 有益效果
相对于现有技术，本发明的背光模组及液晶显示器通过将发光组件设置在反射面侧边的交汇处，并将反射面按照预设轨迹进行设置，该预设轨迹与位于侧边交汇处的发光组件相配合，将发光组件出射的光线反射入光学膜片。显然，本发明使用的发光组件的数目较少，降低了成本以及节省空间，同时还保证了背光模组的光通量的规格要求。
 附图说明
图1为现有技术中背光模组的平面结构示意图；
图2为本发明背光模组中反射件和光源的位置关系示意图；
图3为沿图2中A-A'线的剖视示意图，并且在图3中更进一步地表示出本发明背光模组的反射罩、光源、光学膜片以及反射件之间的相对位置关系；
图4为本发明背光模组中反射件的反射面和光源的平面俯视结构示意图；
图5为沿图4中B-B'线的剖面结构示意图，并且在图5中还更表示出本发明背光模组的光学膜片和反射件之间的位置关系；
图6为本发明背光模组的反射件的反射面上任一点的高度与垂直距离的变化曲线示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。
请一并参阅图2和图3，本发明提供的背光模组包括光学膜片21、反射件22和至少一个发光组件（图未标示），所述发光组件包括光源23和反射罩24（图3）。所述反射件22位于所述光学膜片21的下方并且与所述光学膜片21相对平行设置。所述反射件22包括反射主体221、一位于反射主体222顶面的反射面222以及一位于反射主体222下表面的底面223。
请一并参阅图4，图4为所述反射面222和所述光源23的俯视结构图。所述反射面222的平面俯视结构为方形，包括两相对平行设置的长侧边224以及两相对平行设置的两短侧边225。
请参阅图3，图3为沿图2中虚线A-A'的剖视图，并且在图3中表示出反射罩24、光源23、光学膜片21以及反射件22之间的相对位置关系。
所述光源23包括一发光面231。在本实施例中，该发光面231平行于所述光学膜片21，且所述发光面231朝向所述反射罩24和所述反射件22的所述反射面222。当然，所述发光面231也可以与所述光学膜片21呈一定的夹角，只要使得从发光面231出射的光线能够全部射向所述反射罩24和所述反射面222以使得光亮度均匀即可。
请再参阅图4，所述反射面222的两长侧边224和两短侧边225形成四处交汇处，所述发光组件（图4仅示出发光组件的光源23）设置于所述反射面222上的两个相对的交汇处。当然，在具体实施过程中，所述发光组件还可以根据实际光学需求而被设置在反射面222上的一个或多个交汇处，因此本发明并未限定光源23的实际数量及光源23所在的具体的交汇处。
在本实施例中，所述光源23为长条形，例如发光二极管（LED），其发光面231所在的垂直平面M垂直于所述反射件22的底面223。所述反射面222上任一点到所述垂直平面M具有一垂直距离Ri；所述反射面222上任一点相对于所述底面223形成一高度Di。
本实施例中，所述反射面222为一种具有预设轨迹的自由曲面。更具体的，请参阅图2，该预设轨迹具有这样的特征：所述反射面222上任一点的高度Di随其到光源的垂直平面M的垂直距离Ri增加而下降。
请参阅图6，图6为所述垂直距离Ri和所述高度Di之间的变化曲线示意图。从图6可以得知，在反射面222上，随着所述垂直距离Ri的增加，所述高度Di的变化率逐渐减小。即在靠近所述光源23的位置，所述反射面222的高度Di下降趋势较大，而在远离所述光源23的位置，所述反射面222的高度Di下降趋势趋缓。
请再参阅图4，所述反射面222的短侧边225的长度W和长侧边224的长度L具有一比值µ=W/L；所述光源23的垂直平面M与所述短侧边225具有一入射夹角θ，所述入射夹角θ的范围为0至π/2。在本实施例中，所述入射夹角θ随着所述比值µ的增加而增加。比如长侧边221的长度等于宽侧边222的长度时，µ=1，θ=π/4。
在具体实施过程中，上述入射夹角θ与所述反射面222的预设轨迹相互配合，使得从所述光源23进入所述反射面222的光线经所述反射面222反射后均匀进入所述光学膜片21。
请参阅图5，图5为沿图2中B-B'的剖视结构图，并且图5中还表示出光学膜片21和反射件22之间的位置关系。所述反射件22的长度即为所述反射面222的长侧边224的长度L，所述光学膜片21具有一长度N，在本实施例中，长度L大于长度N，以使得所述光源23可设置于所述反射面222的上方，便于所述光源23的光线射向所述反射面222。
图2至图6示的背光模组的较佳实施例的工作原理为：
所述反射件22的反射面222的四条侧边形成有四处交汇处，将发光组件（包括图3中光源23和反射罩24）设置于其中相对的两个交汇处。且使得所述光源23的发光面231朝向所述反射罩24和所述反射面222。
在所述光源23发光时，从所述光源23出射的光线射向所述反射罩24和所述反射面222，进入所述反射罩24的光线经该反射罩24反射后，一部分直接进入所述光学膜片21（请参阅图3），而另一部分则射向所述反射面222，并经过反射面222反射后最终进入所述光学膜片21。
由于所述反射面222为一具有预设轨迹的自由曲面，由反射罩24与光源23组成的光学组件被安置于该自由曲面的一个或多个交汇处，因此从所述光源23直接射向该反射面222的光线，以及经所述反射罩24反射后进入该反射面222的光线经该反射面222反射后，全部进入所述光学膜片21。
显然，本发明可以使用较少数量的光源23，不但降低了成本，还节省了空间。而且所述光源23采用LED，保证了背光模组的光通量的规格要求。
本发明还提供一种液晶显示器，所述液晶显示器包括本发明提供的背光模组，鉴于该背光模组在上文已有详细的描述，此处不再赘述。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
工业实用性
序列表自由内容

Claims (15)

  1. 一种背光模组，包括光学膜片、反射件和两个发光组件，所述发光组件包括光源和反射罩，所述光源为长条形；所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边，其中：
    所述发光组件设置于由所述反射面的多条侧边形成的交汇处，且所述发光组件的光线出射方向朝向所述反射面；
    所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
  2. 根据权利要求1所述的背光模组，其中，所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
  3. 根据权利要求2所述的背光模组，其中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四个交汇处；
    所述两个发光组件分别设置于所述四个交汇处的其中两个相对的交汇处。
  4. 根据权利要求3所述的背光模组，其中，所述光源的发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；
    所述入射夹角随着所述比值的增加而增加。
  5. 根据权利要求4所述的背光模组，其中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
  6. 一种背光模组，包括光学膜片、反射件和至少一个发光组件，所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边，其中：
    所述发光组件设置于由所述反射面的多条侧边形成的其中一交汇处，且所述发光组件的光线出射方向朝向所述反射面；
    所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
  7. 根据权利要求6所述的背光模组，其中，所述发光组件包括光源和反射罩；
    所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
  8. 根据权利要求7所述的背光模组，其中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四个交汇处；
    所述背光模组包括两个发光组件，这两个发光组件分别设置于所述四个交汇处的其中两个相对的交汇处。
  9. 根据权利要求8所述的背光模组，其中，所述光源为长条形，其中所述发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；
    所述入射夹角随着所述比值的增加而增加。
  10. 根据权利要求9所述的背光模组，其中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
  11. 一种液晶显示器，包括一背光模组，所述背光模组包括光学膜片、反射件和至少一个发光组件，所述反射件位于所述光学膜片的下方且与所述光学膜片相对平行设置，所述反射件包括反射主体以及位于所述反射主体顶面的反射面，所述反射面包括多条侧边；其中，
    所述发光组件设置于由所述反射面的多条侧边形成的其中一交汇处，且所述发光组件的光线出射方向朝向所述反射面；
    所述反射面被设计为一种具有预设轨迹的自由曲面，从所述发光组件射出的光线能够进入所述反射面，经所述反射面反射后均匀进入所述光学膜片。
  12. 根据权利要求11所述的液晶显示器，其中，所述发光组件包括光源和反射罩；
    所述光源包括发光面，该发光面平行于所述光学膜片，且朝向所述反射罩和反射面；所述反射罩用于将来自所述光源的光线反射至所述反射面或者所述光学膜片。
  13. 根据权利要求12所述的液晶显示器，其中，所述反射面的平面俯视结构为方形，包括相对平行的两长侧边和相对平行的两短侧边，该四条侧边形成四个交汇处；
    所述背光模组包括两个发光组件，这两个发光组件设置于所述四个交汇处的其中两个相对的交汇处。
  14. 根据权利要求13所述的液晶显示器，其中，所述光源为长条形，其中所述发光面所在的一垂直平面垂直于所述反射件；所述垂直平面与所述反射面的短侧边呈一入射夹角，所述入射夹角的范围为0至π/2；所述短侧边的长度和所述长侧边的长度具有一比值；
    所述入射夹角随着所述比值的增加而增加。
  15. 根据权利要求14所述的液晶显示器，其中，所述反射面上任一点到所述垂直平面具有一垂直距离；所述反射面上任一点相对于所述反射件的底面具有一高度，其中所述反射面上的任一点的高度随其到所述垂直平面的垂直距离增加而下降，在靠近所述光源的位置，所述高度下降趋势较大，而在远离所述光源的位置，所述高度下降趋势较缓。
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