WO2013134971A1 - 背光模块以及液晶显示装置 - Google Patents

背光模块以及液晶显示装置 Download PDF

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Publication number
WO2013134971A1
WO2013134971A1 PCT/CN2012/073105 CN2012073105W WO2013134971A1 WO 2013134971 A1 WO2013134971 A1 WO 2013134971A1 CN 2012073105 W CN2012073105 W CN 2012073105W WO 2013134971 A1 WO2013134971 A1 WO 2013134971A1
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WO
WIPO (PCT)
Prior art keywords
elongated
backlight module
light
guide plate
light source
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PCT/CN2012/073105
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English (en)
French (fr)
Inventor
韦维砚
黄建发
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/501,457 priority Critical patent/US20130257704A1/en
Publication of WO2013134971A1 publication Critical patent/WO2013134971A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the invention relates to the field of liquid crystal display, in particular to a heat sink (hot) A backlight module and a liquid crystal display device.
  • Liquid crystal display (Liquid Crystal Display, LCD) has been widely used in a variety of electronic products, most of which are backlit LCDs, including liquid crystal display panels and backlight modules (backlight Module).
  • the backlight module can be divided into a side-light type and a direct-light type according to the incident position of the light source (Direct-light) Type) Two to provide a backlight to the LCD panel.
  • Direct-light Direct-light
  • FIG. 1 is a schematic structural view of a conventional lateral light-in which backlight module
  • FIG. 2 is a schematic structural view of a light source of a conventional lateral light-incorporating backlight module.
  • the conventional lateral light-input backlight module the light source is guided by the light guide plate 101, and the light source of the backlight module is disposed on one side of the light guide plate 101.
  • the LEDs 103 of the general light source are arranged on the printed circuit board 102 in parallel at equal intervals, and each of the LEDs 103 has a certain interval therebetween. Due to the existence of the interval between the LEDs 103, the light is uneven at the light incident surface of the light guide plate 101, so that a hot spot phenomenon is easily generated.
  • the present invention provides a backlight module and a liquid crystal display device for mitigating hot spots by changing the arrangement of the elongated light sources, so as to solve the technical problem that the backlight module and the liquid crystal display device of the prior art have hot spots.
  • the present invention relates to a backlight module, wherein the backlight module includes: a light guide plate; An elongated base disposed on a light incident side of the light guide plate; and a plurality of elongated light sources disposed on the elongated base, wherein a long axis direction of each of the elongated light sources and the elongated shape a predetermined angle between the long axis directions of the pedestals, and projections of adjacent elongated light sources in the long axis direction of the elongated base are connected to each other or overlap each other; the preset angle More than 0 degrees and less than 90 degrees; adjacent ones of the elongated light sources have a channel, the width of the channels being greater than 0.6 mm.
  • the backlight module further includes: a reflective element for reflecting light emitted by the elongated light source to a light incident surface of the light guide plate, wherein the elongated light source is disposed at The top or bottom of the light incident side of the light guide plate.
  • the present invention relates to a backlight module, wherein the backlight module includes: a light guide plate; An elongated base disposed on a light incident side of the light guide plate; and a plurality of elongated light sources disposed on the elongated base, wherein a long axis direction of each of the elongated light sources and the elongated shape
  • the bases have a predetermined angle between the long axis directions, and projections of adjacent elongated light sources in the long axis direction of the elongated base are connected to each other or overlap each other.
  • the preset angle is greater than 0 degrees and less than 90 degrees.
  • the preset angle ranges from 60 to 80 degrees.
  • the preset angle ranges from 10 to 30 degrees.
  • adjacent ones of the elongated light sources have a channel, and the width of the channels is greater than 0.6 mm.
  • the backlight module further includes: a reflective element for reflecting light emitted by the elongated light source to a light incident surface of the light guide plate, wherein the elongated light source is disposed at The top or bottom of the light incident side of the light guide plate.
  • the light source setting surface of the elongated base is perpendicular to the light incident surface of the light guide plate.
  • the reflective element is a single-plane reflective sheet, a multi-planar reflective sheet or a curved reflective sheet.
  • the elongated light source is an elongated LED
  • the elongated base is a printed circuit board.
  • the present invention also relates to a liquid crystal display device, wherein the liquid crystal display device includes: a display panel; and a backlight module including: a light guide plate; an elongated base disposed on a light incident side of the light guide plate; and a plurality of lengths a light source disposed on the elongated base, wherein a longitudinal direction of each of the elongated light sources and a longitudinal direction of the elongated base have a predetermined angle, and adjacent to the long The projections of the shaped light sources in the long axis direction of the elongate base are connected to each other or overlap each other.
  • the predetermined angle is greater than 0 degrees and less than 90 degrees.
  • the predetermined angle ranges from 60 to 80 degrees.
  • the predetermined angle ranges from 10 to 30 degrees.
  • adjacent ones of the elongated light sources have a channel, and the width of the channels is greater than 0.6 mm.
  • the backlight module further includes: a reflective element for reflecting light emitted by the elongated light source to a light incident surface of the light guide plate, the elongated light source setting At the top or bottom of the light incident side of the light guide plate.
  • the light source setting surface of the elongated base is perpendicular to the light incident surface of the light guide plate.
  • the reflective element is a single-plane reflective sheet, a multi-planar reflective sheet or a curved reflective sheet.
  • the elongated light source is an elongated LED
  • the elongated base is a printed circuit board.
  • the hot spot phenomenon is slowed down by changing the arrangement of the long light sources to solve the technical problem that the existing backlight module and the liquid crystal display device have hot spots.
  • FIG. 1 is a schematic structural view of a conventional lateral light-in which backlight module
  • FIG. 2 is a schematic structural view of a light source of a conventional lateral light-in which backlight module;
  • FIG. 3 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a first preferred embodiment of an elongated light source of a backlight module of the present invention
  • FIG. 5 is a schematic structural view of a second preferred embodiment of an elongated light source of a backlight module of the present invention.
  • FIG. 6 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention.
  • FIG. 3 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention.
  • the backlight module 200 of the present invention is a side-lit light-emitting backlight module.
  • the backlight module 200 includes a light guide plate 201, an elongated base 202, a plurality of elongated light sources 203, a reflection sheet 204, and an optical film 205.
  • the elongated base 202 can be disposed on the light incident side of the light guide plate 201.
  • the elongated base 202 is provided with a plurality of elongated light sources 203 for laterally emitting light into the light guide plate 201, and is guided by the light guide plate 201. .
  • the reflective sheet 204 is disposed at the bottom of the light guide plate 201 for reflecting light entering the light guide plate 201.
  • the optical film 205 is disposed on the light emitting surface of the light guide plate 201 to improve the optical effect.
  • the projections in the directions are connected to each other or overlap each other.
  • the elongated light source 203 of the backlight module 200 is inclined such that the long axis direction of the elongated light source 203 has a certain angle (preset angle) with the long axis direction of the elongated base 202.
  • the predetermined angle ⁇ is greater than 0 degrees and less than 90 degrees, such as less than or equal to 75 degrees.
  • the adjacent elongated light sources 203 in the long axis direction of the elongated base 202 are connected to each other or overlap each other, the adjacent elongated light sources 203 are eliminated in the horizontal direction (i.e., the long axis direction of the elongated light source 203).
  • the gap enables the light of the elongated light source 203 to be emitted everywhere in the long axis direction of the elongated base 202, thereby reducing the unevenness of the incident light at the light incident surface of the light guide plate 201, and slowing down the backlight. Hot spot phenomenon of module 200.
  • the light source setting surface of the elongated base 202 is substantially parallel to the light incident surface of the light guide plate 201, and the light source setting surface is used to set the elongated light source 203.
  • the elongated light source 203 of the backlight module 200 of the present invention can be designed in various tilting manners, for example, as shown in FIG. 4, which is a schematic structural view of a first preferred embodiment of the elongated light source of the backlight module of the present invention.
  • FIG. 4 the projection of the first elongated light source 203 on the elongated base 202 is the A region, and the projection of the second elongated light source 203 on the elongated base 202 is the B region. It is understood that the A region and the B region are connected to each other such that the light of the elongated light source 203 can be emitted everywhere in the long axis direction of the elongated base 202.
  • the predetermined angle ⁇ between the long axis direction of the elongated light source 203 (the direction indicated by X in FIG. 4) and the long axis direction of the elongated base 202 (the direction indicated by Y in FIG. 4) is larger.
  • the angle ⁇ is set to be 60-80 degrees, so that the backlight module 200 can arrange a plurality of elongated light sources 203, which can correspondingly increase the light output of the backlight module 200.
  • FIG. 5 is a schematic structural view of a second preferred embodiment of the light source of the backlight module of the present invention.
  • the projections of the adjacent elongated light sources 203 on the bottom edges of the elongated bases 202 are also connected to each other or overlap each other (not shown), while the long axis direction of the elongated light source 203 (referred to by X in FIG. 5)
  • the predetermined angle ⁇ between the direction) and the long axis direction of the elongated base 202 (the direction indicated by Y in FIG. 5) is small, and the preset angle ⁇ ranges from 10 to 30 degrees, so that less length is used.
  • the light source 203 can implement the backlight module 200 of the present invention, and thus the cost of the backlight module 200 can be reduced accordingly.
  • the backlight module 200 adopts a small preset angle ⁇ not only can the hot spot phenomenon be better mitigated, but also the thickness of the light guide plate 201 used can be reduced.
  • the preferred range of the preset angle depends on the length of the long side of the elongated light source 203 and the thickness of the light guide plate 201.
  • the thickness of the light guide plate 201 is larger, and the preset angle is preferable.
  • there is a channel (or spacing) between the adjacent elongated light sources 203, and the width Z of the channel may be greater than 0.6 mm to ensure the electrical reliability and installation convenience of the elongated light source 203. Sex.
  • FIG. 6 is a schematic structural view of a second preferred embodiment of the backlight module of the present invention. Only the differences between the present embodiment and the first embodiment will be described below, and the similarities are not described herein again.
  • the backlight module 300 of the second embodiment further includes a reflective element 301.
  • the light source setting surface of the elongated base 202 is substantially perpendicular to the light incident surface of the light guide plate 201.
  • the light source setting surface is used for setting.
  • An elongated light source 203 is used for setting.
  • the light emitted from the elongated light source 203 is not directly incident into the light guide plate 201, but is reflected by the reflective member 301 onto the light incident surface of the light guide plate 201, so that the elongated light source 203 can be disposed on the light incident side of the light guide plate 201.
  • the reflective element 301 can be a single planar reflective sheet, a multi-planar reflective sheet or a curved reflective sheet.
  • the reflective element can also be a wedge-shaped reflector.
  • the elongated light source 203 of the backlight module 300 is still arranged obliquely in such a manner that the long axis direction of the elongated light source 203 has a certain angle with the long axis direction of the elongated base 202.
  • the pedestal 202 since the projections of the adjacent elongated light sources 203 on the bottom edges of the elongated pedestals 202 are connected to each other or overlap each other, the long axis direction of the elongated pedestal 202 can be elongated everywhere.
  • the light of the shaped light source 203 although reflected by the reflective element 301, still makes the incident light more uniform at the light incident surface of the light guide plate 201, and also slows down the hot spot phenomenon of the backlight module 300, while fixing the elongated shape of the elongated light source 203.
  • the pedestal 202 is disposed on the top or bottom of the light incident side of the light guide plate 201, and the narrow frame of the backlight module 300 can be further realized.
  • the elongated light source 203 in the present invention is, for example, a cold cathode fluorescent lamp (Cold Cathode Fluorescent) Lamp, CCFL), Light Emitting Diode (LED), Organic Light Emitting (Organic Light Emitting) Diode, OLED), Electro-Luminescence (EL), LED strips (Light) Bar) or any combination of the above, preferably an elongated LED, the elongated base 202 preferably being a printed circuit board.
  • a cold cathode fluorescent lamp Cold Cathode Fluorescent
  • LED Light Emitting Diode
  • OLED Organic Light Emitting (Organic Light Emitting) Diode
  • EL Electro-Luminescence
  • LED strips Light Bar
  • the reflective sheet 204 in the present invention may be a reflective film or a reflective coating having a high reflectivity material for reflecting light traveling to the light reflecting surface of the light guide plate 201.
  • the high reflectivity material may be, for example, silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, an alloy of any combination thereof, yellowing resistant and heat resistant.
  • White reflective paint or any combination of the above materials to reflect light can be noted that the light reflecting surface of the light guide plate 201 can also be coated with the high reflectivity material to reflect the incident light, so that the reflective sheet 204 can be further replaced and omitted.
  • the optical film 205 in the present invention may be a diffusion sheet, a prism sheet, or a reverse prism sheet (Turning Prism) Sheet), Brightness Enhancement Film (BEF), Reflective Brightness Enhancement Film (Dual Brightness Enhancement) Film, DBEF), non-multilayer film reflective polarizer (Diffused Reflective Polarizer) Film, DRPF, or any combination thereof, is disposed on the light-emitting surface of the light guide plate 201 to improve the optical effect of the light emitted from the light guide plate 201.
  • the present invention also relates to a liquid crystal display device including a display panel and a backlight module, the backlight module including a light guide plate, an elongated base disposed on a light incident side of the light guide plate, and a plurality of elongated shapes disposed on the elongated base a light source, wherein a long axis direction of each elongated light source has a predetermined angle with a long axis direction of the elongated base, and adjacent the elongated light source is in a direction of the long axis of the elongated base Projections are connected to each other or overlap each other.
  • the working principle and the beneficial effects of the liquid crystal display device of the present invention are the same as or similar to those described in the specific embodiment of the backlight module. For details, please refer to the specific embodiment of the backlight module.
  • the backlight module and the liquid crystal display device of the present invention slow down the hot spot phenomenon of the liquid crystal display device by changing the arrangement mode of the long light source, and can select a preset angle according to the actual use condition of the user to achieve a better display effect. Furthermore, the technical problems of the hot spot phenomenon of the existing backlight module and the liquid crystal display device are better solved.

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  • General Physics & Mathematics (AREA)
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Abstract

一种背光模块（200）以及液晶显示装置，背光模块（200）包括导光板（201）；设置在所述导光板（201）的入光侧的长形基座（202）以及多个设置在长形基座（202）上的长形光源（203），其中每一长形光源（203）的长轴方向与长形基座（202）的长轴方向之间具有一预设角度，且相邻长形光源（203）在长形基座（202）的长轴方向上的投影是相互连接或相互重叠。所述的背光模块（200）以及液晶显示装置通过改变长形光源（203）的排列方式来减缓液晶显示装置的热点现象。

Description

背光模块以及液晶显示装置 技术领域
本发明涉及液晶显示领域，特别是涉及一种可减缓热点（hot spot）现象的背光模块以及液晶显示装置。
 背景技术
液晶显示器(Liquid Crystal Display，LCD)已被广泛应用于各种电子产品中，液晶显示器大部分为背光型液晶显示器，其包括液晶显示面板及背光模块(backlight module)。背光模块可依照光源入射位置的不同分成侧向式入光(Side-light type)与直下式入光(Direct-light type)两种，以便提供背光源至液晶显示面板。
如图1和图2所示，图1为现有的侧向式入光背光模块的结构示意图，图2为现有的侧向式入光背光模块的光源的结构示意图。图中现有的侧向式入光背光模块是通过导光板101来导引光源的光线，背光模块的光源是设置于导光板101的一侧。然而，一般光源的LED103是平行等间距地排列在印刷电路板102上，每个LED103之间均具有一定的间隔。由于LED103之间间隔的存在，使得光线在导光板101的入光面处不均匀，从而容易产生热点现象。
故，有必要提供一种背光模块以及液晶显示装置，以解决现有技术所存在的问题。
 技术问题
本发明提供一种通过改变长形光源的排列方式来减缓热点现象的背光模块以及液晶显示装置，以解决现有技术的背光模块以及液晶显示装置具有热点现象的技术问题。
 技术解决方案
本发明涉及一种背光模块，其中所述背光模块包括：导光板； 长形基座，设置在所述导光板的入光侧；以及多个长形光源，设置在所述长形基座上，其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠；所述预设角度大于0度且小于90度；相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
在本发明所述的背光模块中，所述背光模块还包括：反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，所述长形光源设置在所述导光板的入光侧的顶部或底部。
本发明涉及一种背光模块，其中所述背光模块包括：导光板； 长形基座，设置在所述导光板的入光侧；以及多个长形光源，设置在所述长形基座上，其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠。
在本发明所述的背光模块中，所述预设角度大于0度且小于90度。
在本发明所述的背光模块中，所述预设角度的范围为60-80度。
在本发明所述的背光模块中，所述预设角度的范围为10-30度。
在本发明所述的背光模块中，相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
在本发明所述的背光模块中，所述背光模块还包括：反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，所述长形光源设置在所述导光板的入光侧的顶部或底部。
在本发明所述的背光模块中，所述长形基座的光源设置面垂直于所述导光板的入光面。
在本发明所述的背光模块中，所述反射元件为单平面反射片、多平面反射片或曲面反射片。
在本发明所述的背光模块中，所述长形光源为长形LED，所述长形基座为印刷电路板。
本发明还涉及一种液晶显示装置，其中所述液晶显示装置包括：显示面板；以及背光模块，包括：导光板；长形基座，设置在所述导光板的入光侧；以及多个长形光源，设置在所述长形基座上，其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠。
在本发明所述的液晶显示装置中，所述预设角度大于0度且小于90度。
在本发明所述的液晶显示装置中，所述预设角度的范围为60-80度。
在本发明所述的液晶显示装置中，所述预设角度的范围为10-30度。
在本发明所述的液晶显示装置中，相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
在本发明所述的液晶显示装置中，所述背光模块还包括：反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，所述长形光源设置在所述导光板的入光侧的顶部或底部。
在本发明所述的液晶显示装置中，所述长形基座的光源设置面垂直于所述导光板的入光面。
在本发明所述的液晶显示装置中，所述反射元件为单平面反射片、多平面反射片或曲面反射片。
在本发明所述的液晶显示装置中，所述长形光源为长形LED，所述长形基座为印刷电路板。
 有益效果
通过改变长形光源的排列方式来减缓热点现象，以解决现有的背光模块以及液晶显示装置具有热点现象的技术问题。
 附图说明
图1为现有的侧向式入光背光模块的结构示意图；
图2为现有的侧向式入光背光模块的光源的结构示意图；
图3为本发明的背光模块的第一优选实施例的结构示意图；
图4为本发明的背光模块的长形光源的第一优选实施例的结构示意图；
图5为本发明的背光模块的长形光源的第二优选实施例的结构示意图；
图6为本发明的背光模块的第二优选实施例的结构示意图。
 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。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
请参照图3，图3为本发明的背光模块的第一优选实施例的结构示意图。在本实施例中，本发明的背光模块200为侧向式入光的背光模块。背光模块200包括导光板201、长形基座202、多个长形光源203、反射片204以及光学膜片205。长形基座202可设置于导光板201的入光侧，长形基座202上设置有多个长形光源203，用于侧向发光至导光板201内，并由导光板201来引导出光。反射片204设置于导光板201的底部，用于反射进入导光板201内的光线。光学膜片205设置于导光板201的出光面上，以改善光学效果。在本实施例中，每一长形光源203的长轴方向与长形基座202的长轴方向之间具有一预设角度，且相邻长形光源203在长形基座202的长轴方向上的投影相互连接或相互重叠。
本实施例的背光模块200使用时，背光模块200的长形光源203以长形光源203的长轴方向与长形基座202的长轴方向具有一定的角度（预设角度）的方式倾斜的排列在长形基座202上，其中此预设角度Ө大于0度且小于90度，例如小于等于75度。同时由于相邻长形光源203在长形基座202的长轴方向上的投影相互连接或相互重叠，消除了相邻长形光源203在水平方向(即长形光源203的长轴方向)上的间隙，使得在长形基座202的长轴方向上的各处均可发出长形光源203的光线，从而减小了入射光线在导光板201的入光面处的不均匀，减缓了背光模块200的热点现象。在本实施例中，长形基座202的光源设置面实质平行于导光板201的入光面，此光源设置面用于设置长形光源203。
本发明的背光模块200的长形光源203可采用多种倾斜方式进行设计，例如图4所示，图4为本发明的背光模块的长形光源的第一优选实施例的结构示意图。例如图4中左数第一个长形光源203在长形基座202上的投影为A区域，左数第二个长形光源203在长形基座202上的投影为B区域，从图4中可知A区域和B区域相互连接，使得在长形基座202的长轴方向上的各处均可发出长形光源203的光线。同时长形光源203的长轴方向（图4中的X所指方向）与长形基座202的长轴方向（图4中的Y所指方向）之间的预设角度Ө较大，预设角度Ө的范围为60-80度，这样背光模块200可排列较多的长形光源203，可相应的提高背光模块200的出光量。
也可如图5所示，图5为本发明的背光模块的光源的第二优选实施例的结构示意图。其相邻长形光源203在长形基座202的底边上的投影也相互连接或相互重叠（图中未示出），同时长形光源203的长轴方向（图5中的X所指方向）与长形基座202的长轴方向（图5中的Y所指方向）之间的预设角度Ө较小，预设角度Ө的范围为10-30度，这样使用较少的长形光源203即可实现本发明的背光模块200，因而可相应的降低背光模块200的成本。同时背光模块200采用较小的预设角度Ө时，不仅可以较好的减缓热点现象，而且可以减小所使用的导光板201的厚度。
预设角度的可取范围取决于长形光源203的长边长度和导光板201的厚度，在长形光源203的长边长度一定的情况下，导光板201的厚度越大，预设角度的可取范围越大，反之亦然；在导光板201的厚度一定的情况下，长形光源203的长边长度越小，预设角度的可取范围越大，反之亦然。同时相邻的长形光源203之间具有一通道（或间隔），此通道的宽度Z（如图4所示）可大于0.6mm，以确保长形光源203的电性可靠度与安装的便利性。
请参照图6，图6为本发明的背光模块的第二优选实施例的结构示意图。以下仅就本实施例与第一实施例间的相异处进行说明，而其相似处则在此不再赘述。相较于第一实施例，第二实施例的背光模块300还包括反射元件301，此时长形基座202的光源设置面实质垂直于导光板201的入光面，此光源设置面用于设置长形光源203。长形光源203的出射光没有直接射入导光板201中，而是通过反射元件301反射到导光板201的入光面上，因此长形光源203可设置在导光板201的入光侧的顶部或底部，其中反射元件301可为单平面反射片、多平面反射片或曲面反射片。
在本实施例中，反射元件也可为楔形反射件。
本实施例的背光模块300使用时，背光模块300的长形光源203依然以长形光源203的长轴方向与长形基座202的长轴方向具有一定的角度的方式倾斜的排列在长形基座202上，同时由于相邻长形光源203在长形基座202的底边上的投影相互连接或相互重叠，使得在长形基座202的长轴方向上的各处均可发出长形光源203的光线，虽然经过反射元件301的反射，但是依然使得入射光线在导光板201的入光面处更加均匀，同样减缓了背光模块300的热点现象，同时固定长形光源203的长形基座202设置在导光板201的入光侧的顶部或底部，可进一步实现背光模块300的窄边框化。
本发明中的长形光源203例如为冷阴极灯管(Cold Cathode Fluorescent Lamp，CCFL)、发光二极管(Light Emitting Diode，LED)、有机发光二极管(Organic Light Emitting Diode，OLED)、电激发光组件(Electro-Luminescence，EL)、发光灯条(Light Bar)或上述的任意组合，优选为长形LED，长形基座202优选为印刷电路板。
本发明中的反射片204可为反射膜片或反射涂层，其具有高反射率材料，用以反射行进至导光板201的光反射面上的光线。此高反射率材料可例如为银、铝、金、铬、铜、铟、铱、镍、铂、铼、铑、锡、钽、钨、锰、上述任意组合的合金、耐黄化且耐热的白色反射漆料或上述材料的任意组合，以反射光线。值得注意的是，导光板201的光反射面亦可涂布此高反射率材料，以反射入射光线，因而可进一步取代及省略设置反射片204。
本发明中的光学膜片205可为扩散片、棱镜片、逆棱镜片(Turning Prism Sheet)、增亮膜(Brightness Enhancement Film，BEF)、反射式增亮膜(Dual Brightness Enhancement Film，DBEF)、非多层膜式反射偏光片(Diffused Reflective Polarizer Film，DRPF)或上述的任意组合，其设置于导光板201的出光面上，用以改善由导光板201出光的光学效果。
本发明还涉及一种液晶显示装置，其中包括显示面板以及背光模块，背光模块包括导光板、设置在导光板的入光侧的长形基座以及多个设置在长形基座上的长形光源，其中每个长形光源的长轴方向与长形基座的长轴方向具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠。本发明的液晶显示装置的工作原理和有益效果与上述的背光模块的具体实施例中描述的相同或相似，具体请参见上述背光模块的具体实施例。
由上述可知，本发明的背光模块和液晶显示装置通过改变长形光源的排列方式来减缓液晶显示装置的热点现象，并可根据使用者的实际使用情况选择预设角度从而达到较佳的显示效果，进而较好了解决了现有背光模块和液晶显示装置热点现象较严重的技术问题。
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
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Claims (20)

  1. 一种背光模块，其中所述背光模块包括：
    导光板；
    长形基座，设置在所述导光板的入光侧；以及
    多个长形光源，设置在所述长形基座上，
    其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠；
    所述预设角度大于0度且小于90度；
    相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
  2. 根据权利要求1所述的背光模块，其中所述背光模块还包括：
    反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，
    所述长形光源设置在所述导光板的入光侧的顶部或底部。
  3. 一种背光模块，其中所述背光模块包括：
    导光板；
    长形基座，设置在所述导光板的入光侧；以及
    多个长形光源，设置在所述长形基座上，
    其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠。
  4. 根据权利要求3所述的背光模块，其中所述预设角度大于0度且小于90度。
  5. 根据权利要求4所述的背光模块，其中所述预设角度的范围为60-80度。
  6. 根据权利要求4所述的背光模块，其中所述预设角度的范围为10-30度。
  7. 根据权利要求3所述的背光模块，其中相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
  8. 根据权利要求3所述的背光模块，其中所述背光模块还包括：
    反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，
    所述长形光源设置在所述导光板的入光侧的顶部或底部。
  9. 根据权利要求8所述的背光模块，其中所述长形基座的光源设置面垂直于所述导光板的入光面。
  10. 根据权利要求8所述的背光模块，其中所述反射元件为单平面反射片、多平面反射片或曲面反射片。
  11. 根据权利要求3所述的背光模块，其中所述长形光源为长形LED，所述长形基座为印刷电路板。
  12. 一种液晶显示装置，其中所述液晶显示装置包括：
    显示面板；以及
    背光模块，包括：
    导光板；
    长形基座，设置在所述导光板的入光侧；以及
    多个长形光源，设置在所述长形基座上，
    其中每一所述长形光源的长轴方向与所述长形基座的长轴方向之间具有一预设角度，且相邻所述长形光源在所述长形基座的所述长轴方向上的投影是相互连接或相互重叠。
  13. 根据权利要求12所述的液晶显示装置，其中所述预设角度大于0度且小于90度。
  14. 根据权利要求13所述的液晶显示装置，其中所述预设角度的范围为60-80度。
  15. 根据权利要求13所述的液晶显示装置，其中所述预设角度的范围为10-30度。
  16. 根据权利要求12所述的液晶显示装置，其中相邻的所述长形光源之间具有一通道，所述通道的宽度大于0.6mm。
  17. 根据权利要求12所述的液晶显示装置，其中所述背光模块还包括：
    反射元件，用于将所述长形光源发出的光反射到所述导光板的入光面上，
    所述长形光源设置在所述导光板的入光侧的顶部或底部。
  18. 根据权利要求17所述的液晶显示装置，其中所述长形基座的光源设置面垂直于所述导光板的入光面。
  19. 根据权利要求17所述的液晶显示装置，其中所述反射元件为单平面反射片、多平面反射片或曲面反射片。
  20. 根据权利要求12所述的液晶显示装置，其中所述长形光源为长形LED，所述长形基座为印刷电路板。
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