WO2013149407A1 - 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
WO2013149407A1
WO2013149407A1 PCT/CN2012/073766 CN2012073766W WO2013149407A1 WO 2013149407 A1 WO2013149407 A1 WO 2013149407A1 CN 2012073766 W CN2012073766 W CN 2012073766W WO 2013149407 A1 WO2013149407 A1 WO 2013149407A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
backlight module
support
slope
Prior art date
Application number
PCT/CN2012/073766
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English (en)
French (fr)
Inventor
张光耀
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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 US13/512,569 priority Critical patent/US8804072B2/en
Publication of WO2013149407A1 publication Critical patent/WO2013149407A1/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
    • G02B6/0081—Mechanical 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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • 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
    • G02B6/0081—Mechanical 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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide

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.
  • the single-side light-in mode in the backlight module is becoming more and more popular.
  • the one-side light-in mode can only reduce the number of printed circuit boards, the number of heat-dissipating blocks of light sources (such as LEDs), the number of light sources, the number of light-source driving boards, and components, since the light source only needs to be disposed on one side of the light guide plate.
  • the number, the number of channels, the number of wires, and the number of connectors are easy to assemble.
  • FIG. 1 is a schematic top view of a single-side light-input mode backlight module in the prior art. More specifically, the single-side light-in mode is a single-length light-in mode.
  • the backlight module includes a light source 11 and a light guide plate 12, wherein the light source 11 has an elongated shape, and the light guide plate 12 includes a long side 121 and a short side 122.
  • the light source 11 is correspondingly disposed on the side of the long side 121, and the light source 11
  • a positioning post 13 is disposed between the light guide plate 12.
  • the plastic material may vary due to the external environment.
  • PMMA polymethacrylate
  • Weight water absorption refers to the percentage of the weight absorbed by the material inside the material when the water is saturated.
  • the width of the light guide plate 12 is 395 mm, once the weight water absorption rate reaches 2%, the width of the light guide plate 12 is increased by 1.62 mm.
  • the light guide plate 12 also changes due to excessive temperature.
  • a minimum coupling distance L' is generally required between the light source 11 and the light guide plate 12.
  • the gravity direction A' of the light guide plate 12 is parallel to the coupling light distance direction B', even if the light guide plate 12 changes due to external influences (such as a large volume),
  • the direction of the change is along the direction of gravity A' of the light guide plate 12, so that the light guide plate 12 can be brought closer to the light source 11, and the isolation of the positioning post 13 can ensure a minimum coupling between the light source 11 and the light guide plate 12.
  • the distance L' is such that a highest coupling efficiency is achieved, and also that the light guide plate 12 does not hit the light source 11.
  • the light source 11 is disposed on the short side 122 of the light guide plate 12, and the weight direction A' of the light guide plate 12 and the coupling light distance direction B' are perpendicular to each other.
  • the direction of change will still be along the gravity direction A' of the light guide plate 12.
  • An object of the present invention is to provide a backlight module, which solves the problem in the prior art that in the single short-side light entering mode, when the gravity direction of the light guide plate is perpendicular to the coupling light distance direction, when the light guide plate changes along the gravity direction The minimum coupling distance of the light source and the light guide plate is not guaranteed, thereby affecting the technical problem of the coupling efficiency.
  • Another object of the present invention is to provide a liquid crystal display to solve the problem in the prior art that in the single short-side light entering mode, since the gravity direction of the light guide plate is perpendicular to the coupling light distance direction, when the light guide plate changes along the gravity direction The minimum coupling distance of the light source and the light guide plate is not guaranteed, thereby affecting the technical problem of the coupling efficiency.
  • the present invention has a backlight module including a light guide plate and a light source.
  • the light guide plate includes a reflective surface and a light exiting surface.
  • the reflective surface and the light emitting surface include two bottom surfaces and two side surfaces, and the two bottom surfaces include a Supporting the bottom surface;
  • the light source is elongated and disposed corresponding to one side of the light guide plate, and a positioning column is disposed between the light source and the light guide plate, wherein:
  • the backlight module further includes a support column, the support bottom surface is provided with a contact slope, and the support column is attached to the contact slope;
  • a direction of gravity is parallel to a length direction of the light source, and when the light guide plate changes along a direction of gravity thereof, a force is generated between the support column and the support column, and the force is A support post urges the light guide plate toward the light source, and the support column further supports the light guide plate in a direction opposite to the direction of gravity.
  • the positioning post has a diameter equal to a minimum coupling distance
  • the minimum coupling distance separates the light guide plate from the light source, and causes the light emitted from the light source to enter the light guide plate to be the most.
  • the contact slope is formed by a partial recess on the support bottom surface, the contact slope having a fixed slope.
  • the contact slope is formed by a partial recess on the support bottom surface, and the contact slope is a curved surface.
  • the contact slope is integrally formed by the support bottom surface, and the contact slope has a fixed slope.
  • the support slope includes a first support slope and a second support slope, and the first support slope and the second support slope are opposite to each other.
  • the two positioning pillars disposed between the light source and the light guide plate, and the two positioning pillars are respectively disposed at two ends of the elongated light source, and are disposed Between the light source and the light guide plate.
  • the backlight module further includes a back plate, and the support column is fixedly disposed on the back plate.
  • Another object of the present invention is to provide a backlight module to solve the problem in the prior art that in the single short-side light entering mode, since the gravity direction of the light guide plate is perpendicular to the coupling light distance direction, the light guide plate changes along the gravity direction. When the minimum coupling distance between the light source and the light guide plate is not guaranteed, the technical problem of the coupling light efficiency is affected.
  • the present invention provides a backlight module including a light guide plate and a light source
  • the light guide plate includes a reflective surface and a light exit surface
  • the reflective surface and the light exit surface include two bottom surfaces and two side surfaces.
  • the two bottom surfaces include a supporting bottom surface; the light source is elongated and disposed corresponding to one side of the light guiding plate,
  • the backlight module further includes a support column, the support bottom surface is provided with a contact slope; the support column is attached to the contact slope;
  • a direction of gravity is parallel to the length direction of the light source, and when the light guide plate changes along the direction of gravity thereof, a force is generated between the support column and the support column, and the support is supported by the force A post pushes the light guide toward the light source.
  • a positioning post is disposed between the light source and the light guide plate, the positioning post has a diameter, and the diameter is equal to a minimum coupling distance;
  • the minimum coupling distance separates the light guide plate from the light source, and causes the light emitted from the light source to enter the light guide plate to be the most.
  • the contact slope is formed by a partial recess on the support bottom surface, and the contact slope mask has a fixed slope.
  • the contact slope is formed by a partial recess on the support bottom surface, and the contact slope is a curved surface.
  • the contact slope is integrally formed by the support bottom surface, and the contact slope mask has a fixed slope.
  • the support slope includes a first support slope and a second support slope, and the first support slope and the second support slope are opposite to each other.
  • the light guide plate when the light guide plate changes along the direction of gravity, a force is generated between the support column and the support column, and the support column is further along the force.
  • the light guide plate is supported in a direction opposite to the direction of gravity.
  • the backlight module includes two positioning posts, which are respectively disposed at two ends of the elongated light source, and are disposed on the light source and the light guide plate. between.
  • the backlight module further includes a back plate, and the support column is fixedly disposed on the back plate.
  • Another object of the present invention is to provide a liquid crystal display to solve the problem in the prior art that in the single short-edge light-in mode, when the direction of gravity of the light guide plate is perpendicular to the direction of the coupling light distance, when the light guide plate changes along the direction of gravity The minimum coupling distance of the light source and the light guide plate is not guaranteed, thereby affecting the technical problem of the coupling efficiency.
  • the present invention constructs a liquid crystal display
  • the liquid crystal display includes a backlight module
  • the backlight module includes a light guide plate and a light source
  • the light guide plate includes a reflective surface and a light emitting surface, and the reflective surface
  • the light-emitting surface includes two bottom surfaces and two side surfaces, the two bottom surfaces include a supporting bottom surface
  • the light source is elongated and disposed corresponding to one side of the light guiding plate
  • the backlight module further includes a support column, the support bottom surface is provided with a contact slope, and the support column is attached to the contact slope;
  • a direction of gravity is parallel to a length direction of the light source, and when the light guide plate changes along a direction of gravity thereof, a force is generated between the support column and the support column, and the force is A support post pushes the light guide plate toward the light source.
  • the present invention provides a contact inclined surface on the supporting bottom surface of the light guide plate, and a supporting column is disposed to fit the contact inclined surface, and the oblique direction of the contact inclined surface is consistent with the light entering direction of the light source, when the light guiding plate is in the direction of gravity
  • the force generated between the support post and the contact slope pushes the light guide plate toward the light source, thereby ensuring a minimum coupling distance between the light source and the light guide plate, and ensuring the coupling efficiency.
  • FIG. 1 is a schematic structural view of a single long-edge light-input backlight module in the prior art
  • FIG. 2 is a schematic structural view of a single short-edge light-input backlight module in the prior art
  • FIG. 3 is a schematic structural view of a first preferred embodiment of a backlight module according to the present invention.
  • Figure 4 is a top plan view of Figure 3;
  • Figure 5 is a schematic exploded view of the force between the support post and the contact bevel of the present invention.
  • FIG. 6 is a top plan view showing a second preferred embodiment of a backlight module of the present invention.
  • FIG. 7 is a top plan view showing a third preferred embodiment of a backlight module of the present invention.
  • FIG. 8 is a top plan view showing a fourth preferred embodiment of the backlight module of the present invention.
  • FIG. 3 is a schematic structural view of a first preferred embodiment of a backlight module according to the present invention
  • FIG. 4 is a top view of FIG.
  • the backlight module includes a light source 21, a light guide plate 22, a positioning post 23, and a support post 24.
  • the light guide plate 22 includes a reflective surface 221 and a light exit surface 222.
  • the reflective surface 221 and the light exit surface 222 include an upper bottom surface 223 and a support bottom surface 224, and further includes a left side surface 225 and a right side surface 226.
  • the length of the upper bottom surface 223 or the support bottom surface 224 is greater than the length of the left side surface 225 or the right side surface 226.
  • the support bottom surface 224 is provided with a contact slope 227 whose inclination direction coincides with the incident direction of the light source (see below for details).
  • the contact slope 227 is formed by a partial recess on the support bottom surface 224 (in a triangular shape).
  • the contact slope 227 may also be formed by other means, such as by The portion of the support bottom surface 224 is extended to form a triangular shape, which will not be further described herein.
  • the support post 24 is attached to the contact slope 227.
  • the contact ramp 227 has a fixed slope.
  • the contact ramp 227 includes a first contact ramp 2271 and a second contact ramp 2272.
  • a vertical incident direction B is a direction from the light source 21 and vertically entering the left side surface 225
  • the first contact slope 2271 has a fixed angle ⁇ with the direction B (refer to FIG. 5).
  • the second contact slope 2272 also has a fixed angle ⁇ with the direction B, has a fixed second slope ⁇ 2, and the first slope ⁇ 1 is the same as the second slope ⁇ 2.
  • the light source 21 has an elongated shape with a length C, and the light source 21 is disposed corresponding to the left side surface 225 of the light guide plate 22, and the light emitted from the light source 21 passes through the light source 21
  • the left side surface 225 enters the light guide plate 22, is reflected by the reflection surface 221, and is finally emitted by the light exit surface 222.
  • the backlight module includes two positioning posts 23, which are respectively disposed at two ends of the elongated light source 21, and are disposed at the Between the light source 21 and the light guide plate 22.
  • the positioning post 24 has a diameter Q (not shown) which is equal to the minimum coupling distance M between the light source 21 and the light guide plate 22.
  • the minimum coupling distance M can separate the light guide plate 22 and the light source 21 from each other, and can cause the light emitted from the light source 21 to enter the light guide plate 22 to be the most.
  • the minimum coupling distance M is 0.15 mm. ⁇ 0.4mm.
  • the gravity direction A of the light guide plate 22 is parallel to the light source length direction C and perpendicular to the direction B.
  • the light guide plate 22 changes along its gravity direction A (for example, the weight water absorption rate reaches 2%, the volume becomes larger along the gravity direction A)
  • the light guide plate 22 faces the support column 24 under the action of its gravity.
  • a pressure is generated, under the action of the pressure, the support post 24 generates a force F to the contact slope 227 of the light guide plate 22, and the force F is perpendicular to the contact slope 227, and can be decomposed into the thrust F1 and the supporting force.
  • F2 the direction of the thrust F1 is opposite to the direction B, and the light guide plate 22 is pushed toward the light source 21; the support force F2 is opposite to the gravity direction A to support the light guide plate 22.
  • the backlight module further includes a back plate (not shown), and the support column 23 is fixedly disposed on the back plate.
  • the backlight module if it is affected by external conditions, such as external humidity, the water absorption rate of the light guide plate 22 reaches 2%, or the external temperature becomes high, etc., the external influence causes the light guide plate 22 to follow along
  • the direction of gravity A changes, for example, the volume becomes larger.
  • the light guide plate 22 generates a pressure on the support column 24 under the action of its gravity. Under the pressure, the support column 23 generates a force F to the contact slope 227 of the light guide plate 22.
  • the force F is perpendicular to the contact slope 227, decomposed into a thrust F1 opposite to the direction B, and a supporting force F2 opposite to the direction of gravity A, the thrust F1 pushing the light guide plate 22 toward the The light source 21 and the support force F2 support the light guide plate 22.
  • the light guide plate 22 is moved toward the light source 21, and the spacing of the positioning posts 23 is matched to maintain a minimum coupling between the light source 21 and the light guide plate 22.
  • the minimum coupling distance M can separate the light guide plate 22 from the light source 21, and the light emitted from the light source 21 and entering the light guide plate 22 can be maximized, which greatly ensures the distance. Twilight efficiency.
  • the light guide plate 22 is less likely to rotate due to the supporting action of the supporting force F2.
  • FIG. 6 is a schematic top plan view of a second preferred embodiment of a backlight module of the present invention.
  • the contact slope 227 is integrally formed by the support bottom surface 224 (please refer to FIG. 3 together). The slope is formed, and the contact slope 227 has a fixed angle with the direction B and has a fixed slope.
  • FIG. 7 is a schematic top plan view of a third preferred embodiment of a backlight module of the present invention.
  • the contact slope 227 is formed by a partial recess on the support bottom surface 224, and the contact slope 227 is a
  • the surface of the surface has a varying slope.
  • the surface can be a curved surface with a uniform slope, or it can be formed by bending multiple planes, which will not be repeated here.
  • FIG. 8 is a schematic top plan view of a fourth preferred embodiment of the backlight module of the present invention.
  • the contact slope 227 includes a first contact slope 2271 and a second contact slope 2272, the first contact The inclined direction of the inclined surface 2271 and the second contact inclined surface 2272 is opposite, that is, the first contact inclined surface 2271 is inclined counterclockwise, and the second contact inclined surface 2272 is inclined clockwise.
  • 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.
  • the contact slope is provided on the bottom surface of the light guide plate, and a support column is disposed to fit the contact slope.
  • the inclination direction of the contact slope is consistent with the light entering direction of the light source.

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

Abstract

一种背光模组，导光板（22）的反射面（221）和出光面（222）之间包括两底面，两底面包括一支撑底面（224）；背光模组还包括有支撑柱（24），支撑底面（224）设置有接触斜面（227）；支撑柱（24）贴合所述接触斜面（227）；一重力方向为平行于光源长度方向，在导光板（22）沿着其重力方向发生变化时，与所述支撑柱（24）之间产生力的作用。还披露了一种具有背光模组的液晶显示器。

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
背光模组中的单侧入光模式越来越普及。其中，单侧入光模式由于仅需将光源设置在导光板的其中一侧即可，因此可以减少印刷电路板的数量、光源（譬如LED）散热块数量、光源数量、光源驱动板数量、元件数量、通道数量、导线数量以及连接器数量等，而且组装方便。
请参阅图1，图1为现有技术中单侧入光模式背光模组的俯视结构示意图，更具体的，该单侧入光模式为单长边入光模式。
所述背光模组包括光源11和导光板12，其中，光源11为长条形，导光板12包括长侧边121和短侧边122，光源11对应设置在长侧边121一侧，光源11和导光板12之间设置有定位柱13。
由于导光板12为塑胶材料，该塑胶材料会由于外部环境的不同而发生变化。譬如以聚甲基丙烯酸酯（PMMA）为例，如果外界潮湿，导致PMMA重量吸水率达到2%（重量吸水率是指材料在吸水饱和时，其内部所吸收水分的重量占材料干重量的百分率），则会造成导光板12体积的变化。譬如若导光板12的宽度为395mm，一旦重量吸水率达到2%，就会使得导光板12的宽度增加1.62mm。而且在高温操作条件下，导光板12也会由于温度过高而发生变化。
由于导光板12自身重力的作用，导光板12在发生变化时，其变化方向沿着该导光板12的重力方向A'。而为了保证导光板12的耦光效率，在耦光距离方向B'（即光线垂直入射导光板12方向），光源11与导光板12之间一般需保持一最小耦光距离L'。
在单长边入光模式下，请参阅图1，由于导光板12的重力方向A'与耦光距离方向B'平行，即便是导光板12由于外界影响发生变化（譬如体积变大），由于该变化方向沿着导光板12的重力方向A'，因此可以使得导光板12更接近光源11，再加上定位柱13的隔离作用，可以保证光源11和导光板12之间保持一最小耦光距离L'，从而实现一最高的耦光效率，而且还保证导光板12不会碰到光源11。
但是在单短边入光模式下，请参阅图2，光源11设置在导光板12的短侧边122，此时导光板12的重量方向A'与耦光距离方向B'互相垂直。导光板12由于外界影响发生变化时，其变化方向仍会沿着导光板12的重力方向A'，此时不能再保证光源11和导光板12之间保持上述最小耦光距离L'，而且还会造成导光板13发生旋转，进而造成效率损失以及辉度均匀性下降等问题。
综上，在单短边入光模式下，由于导光板的重力方向与耦光距离方向垂直，在导光板沿重力方向发生变化时，导致光源和导光板的最小耦光距离得不到保证，进而影响耦光效率。
 技术问题
本发明的一个目的在于提供一种背光模组，以解决现有技术中在单短边入光模式下，由于导光板的重力方向与耦光距离方向垂直，在导光板沿重力方向发生变化时，导致光源和导光板的最小耦光距离得不到保证，进而影响耦光效率的技术问题。
本发明的另一个目的在于提供一种液晶显示器，以解决现有技术中在单短边入光模式下，由于导光板的重力方向与耦光距离方向垂直，在导光板沿重力方向发生变化时，导致光源和导光板的最小耦光距离得不到保证，进而影响耦光效率的技术问题。
 技术解决方案
本发明构造了一种背光模组，包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置，所述光源和所述导光板之间设置有定位柱，其中：
所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面，所述支撑柱贴合所述接触斜面；
其中，一重力方向为平行于所述光源的长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源，所述支撑柱还沿着与所述重力方向相反的方向支撑所述导光板。
在本发明的背光模组中，所述定位柱具有一直径，该直径等于一最小耦光距离；
所述最小耦光距离既使得所述导光板和所述光源分离，又使得从所述光源出射、并进入所述导光板的光线最多。
在本发明的背光模组中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面具有固定的斜率。
在本发明的背光模组中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面为一曲面。
在本发明的背光模组中，所述接触斜面由所述支撑底面整体倾斜形成，且该接触斜面具有固定的斜率。
在本发明的背光模组中，所述支撑斜面包括第一支撑斜面和第二支撑斜面，所述第一支撑斜面和所述第二支撑斜面的倾斜方向相反。
在本发明的背光模组中，设置于所述光源和所述导光板之间的定位柱的数目有两个，该两个定位柱分别设置于所述长条形光源的两端，并设置于所述光源和所述导光板之间。
在本发明的背光模组中，所述背光模组还包括背板，所述支撑柱固定设置在所述背板上。
本发明的另一个目的在于提供一种背光模组，以解决现有技术中在单短边入光模式下，由于导光板的重力方向与耦光距离方向垂直，在导光板沿重力方向发生变化时，导致光源和导光板的最小耦光距离得不到保证，进而影响耦光效率的技术问题。
为解决上述问题，本发明构造了一种背光模组，包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置，
所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面；所述支撑柱贴合所述接触斜面；
其中，一重力方向为平行于所述光源长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源。
在本发明的背光模组中，所述光源和所述导光板之间设置有定位柱，所述定位柱具有一直径，该直径等于一最小耦光距离；
所述最小耦光距离既使得所述导光板和所述光源分离，又使得从所述光源出射、并进入所述导光板的光线最多。
在本发明的背光模组中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面具有一固定的斜率。
在本发明的背光模组中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面为一曲面。
在本发明的背光模组中，所述接触斜面由所述支撑底面整体倾斜形成，且该接触斜面具有一固定的斜率。
在本发明的背光模组中，所述支撑斜面包括第一支撑斜面和第二支撑斜面，所述第一支撑斜面和所述第二支撑斜面的倾斜方向相反。
在本发明的背光模组中，在所述导光板沿着所述重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱还沿着与所述重力方向相反的方向支撑所述导光板。
在本发明的背光模组中，所述背光模组包括两个定位柱，该两个定位柱分别设置于所述长条形光源的两端，并设置于所述光源和所述导光板之间。
在本发明的背光模组中，所述背光模组还包括背板，所述支撑柱固定设置在所述背板上。
本发明的又一个目的在于提供一种液晶显示器，以解决现有技术中在单短边入光模式下，由于导光板的重力方向与耦光距离方向垂直，在导光板沿重力方向发生变化时，导致光源和导光板的最小耦光距离得不到保证，进而影响耦光效率的技术问题。
为解决上述问题，本发明构造了一种液晶显示器，所述液晶显示器包括一背光模组，所述背光模组包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置；
所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面，所述支撑柱贴合所述接触斜面；
其中，一重力方向为平行于所述光源的长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源。
 有益效果
本发明相对于现有技术，通过在导光板的支撑底面设置接触斜面，并设置一支撑柱贴合所述接触斜面，上述接触斜面的倾斜方向与光源入光方向一致，当导光板在重力方向发生变化时，上述支撑柱与接触斜面间产生的力将所述导光板推向光源，进而保证了光源和导光板之间保持一最小耦光距离，保证了耦光效率。
 附图说明
图1为现有技术中单长边入光模式背光模组的结构示意图；
图2为现有技术中单短边入光模式背光模组的结构示意图；
图3为本发明中背光模组的第一较佳实施例结构示意图；
图4为图3的俯视结构示意图；
图5为本发明支撑柱和接触斜面之间力的分解示意图；
图6为本发明中背光模组的第二较佳实施例俯视结构示意图；
图7为本发明中背光模组的第三较佳实施例俯视结构示意图；
图8为本发明中背光模组的第四较佳实施例俯视结构示意图。
 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。
请参阅图3，图3为本发明中背光模组的第一较佳实施例结构示意图，图4为图3的俯视图。所述背光模组包括光源21、导光板22、定位柱23以及支撑柱24。
所述导光板22包括反射面221和出光面222，所述反射面221和所述出光面222之间包括上底面223和支撑底面224，还包括左侧面225和右侧面226，其中，所述上底面223或支撑底面224的长度大于左侧面225或右侧面226的长度。
所述支撑底面224设置有接触斜面227，所述接触斜面227倾斜方向与光源入射方向一致（详细请参阅下文）。在该第一较佳实施例中，所述接触斜面227由所述支撑底面224上的部分凹陷形成（为一三角形形状），当然所述接触斜面227也可以通过其它方式形成，譬如由所述支撑底面224上的部分延伸凸出形成一三角形形状，此处不再一一赘述。
其中，所述支撑柱24贴合所述接触斜面227。在图3所示的第一较佳实施例中，所述接触斜面227具有一固定的斜率。所述接触斜面227包括第一接触斜面2271和第二接触斜面2272。
请一并参阅图4，一垂直入射方向B为从所述光源21出射并垂直进入左侧面225的方向，所述第一接触斜面2271与方向B呈固定夹角θ（请参阅图5），具有固定的第一斜率µ1；所述第二接触斜面2272同样与方向B呈固定夹角θ，具有固定的第二斜率µ2，且上述第一斜率µ1与第二斜率µ2相同。
请一并参阅图3和图4，所述光源21为长条形，其长度方向为C，所述光源21对应导光板22的左侧面225设置，从所述光源21出射的光线经所述左侧面225进入所述导光板22，经所述反射面221的反射，最后由所述出光面222出射。
在图3所示的第一较佳实施例中，所述背光模组包括两个定位柱23，该两个定位柱23分别设置于所述长条形光源21的两端，并设置于所述光源21和所述导光板22之间。所述定位柱24具有一直径Q（图未标示），该直径Q等于光源21和导光板22之间的最小耦光距离M。
其中，上述最小耦光距离M既能够使得所述导光板22和所述光源21相互分离，又能够使得从所述光源21出射、并进入所述导光板22的光线最多。譬如最小耦光距离M的范围为0.15mm ~ 0.4mm。
请参阅图5，导光板22的重力方向A平行于所述光源长度方向C，且垂直于方向B。在所述导光板22沿着其重力方向A发生变化时（譬如重量吸水率达到2%导致体积沿重力方向A变大），所述导光板22在其重力的作用下对所述支撑柱24产生一压力，在该压力的作用下，所述支撑柱24对所述导光板22的接触斜面227产生一力F的作用，该力F垂直于接触斜面227，可分解为推力F1和支撑力F2：推力F1的方向与方向B相反，将所述导光板22推向所述光源21；支撑力F2与所述重力方向A相反，以支撑所述导光板22。
在本实施例中，所述背光模组还包括背板（图未示出），所述支撑柱23固定设置在所述背板上。
图3至图5所示的第一较佳实施例的工作原理为：
所述背光模组在工作过程中，一旦受到外界条件的影响，譬如外界潮湿，使得导光板22的重量吸水率达到2%，或者外界温度变高等，上述外界影响使得所述导光板22沿着其重力方向A发生变化，譬如体积变大。
此时，所述导光板22在其重力的作用下对所述支撑柱24产生一压力，在该压力的作用下，所述支撑柱23对所述导光板22的接触斜面227产生一力F的作用，该力F垂直于接触斜面227，分解为与方向B相反方向的推力F1，以及与所述重力方向A相反方向的支撑力F2，上述推力F1将所述导光板22推向所述光源21，上述支撑力F2支撑所述导光板22。
显然，由于上述推力F1的作用，使得所述导光板22朝向所述光源21运动，再配合所述定位柱23的间隔作用，使得所述光源21和所述导光板22之间保持最小耦光距离M，该最小耦光距离M既能够使得所述导光板22和所述光源21分离，又能够使得从所述光源21出射、并进入所述导光板22的光线最多，极大的保证了藕光效率。而且，由于支撑力F2的支撑作用，所述导光板22不易发生旋转。
图6为本发明背光模组的第二较佳实施例的俯视结构示意图。
与图3所示的第一较佳实施例不同之处在于，图6所示的第二较佳实施例中，所述接触斜面227由所述支撑底面224（请一并参阅图3）整体倾斜形成，该接触斜面227与方向B呈一固定夹角，且具有一固定的斜率。
图7为本发明背光模组的第三较佳实施例的俯视结构示意图。
与图3所示的第一较佳实施例不同之处在于，在该第三较佳实施例中，所述接触斜面227由所述支撑底面224上的部分凹陷形成，该接触斜面227为一曲面，该曲面的斜率是变化的，该曲面可以为斜率变化均匀的曲面，也可以由多个平面弯折形成，此处不再一一赘述。
图8为本发明背光模组中第四较佳实施例的俯视结构示意图。
与图3所示的第一较佳实施例不同之处在于，在该第四较佳实施例中，所述接触斜面227包括第一接触斜面2271和第二接触斜面2272，所述第一接触斜面2271和所述第二接触斜面2272的倾斜方向相反，即所述第一接触斜面2271沿逆时针倾斜，所述第二接触斜面2272沿顺时针倾斜。
其中，上述第二至第四较佳实施例的原理请参阅针对图3至图5所示的第一较佳实施例的详细描述，此处不再赘述。
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。
本发明通过在导光板的支撑底面设置接触斜面，并设置一支撑柱贴合所述接触斜面，上述接触斜面的倾斜方向与光源入光方向一致，当导光板在重力方向发生变化时，上述支撑柱与接触斜面间产生的力将所述导光板推向光源，进而保证了光源和导光板之间保持一最小耦光距离，保证了耦光效率。
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
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Claims (18)

  1. 一种背光模组，包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置，所述光源和所述导光板之间设置有定位柱，其中：
    所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面，所述支撑柱贴合所述接触斜面；
    其中，一重力方向为平行于所述光源的长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源，所述支撑柱还沿着与所述重力方向相反的方向支撑所述导光板。
  2. 根据权利要求1所述的背光模组，其中，所述定位柱具有一直径，该直径等于一最小耦光距离；
    所述最小耦光距离既使得所述导光板和所述光源分离，又使得从所述光源出射、并进入所述导光板的光线最多。
  3. 根据权利要求1所述的背光模组，其中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面具有固定的斜率。
  4. 根据权利要求1所述的背光模组，其中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面为一曲面。
  5. 根据权利要求1所述的背光模组，其中，所述接触斜面由所述支撑底面整体倾斜形成，且该接触斜面具有固定的斜率。
  6. 根据权利要求1所述的背光模组，其中，所述支撑斜面包括第一支撑斜面和第二支撑斜面，所述第一支撑斜面和所述第二支撑斜面的倾斜方向相反。
  7. 根据权利要求1所述的背光模组，其中，设置于所述光源和所述导光板之间的定位柱的数目有两个，该两个定位柱分别设置于所述长条形光源的两端，并设置于所述光源和所述导光板之间。
  8. 根据权利要求1所述的背光模组，其中，所述背光模组还包括背板，所述支撑柱固定设置在所述背板上。
  9. 一种背光模组，包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置，其中：
    所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面，所述支撑柱贴合所述接触斜面；
    其中，一重力方向为平行于所述光源的长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源。
  10. 根据权利要求9所述的背光模组，其中，所述光源和所述导光板之间设置有定位柱，所述定位柱具有一直径，该直径等于一最小耦光距离；
    所述最小耦光距离既使得所述导光板和所述光源分离，又使得从所述光源出射、并进入所述导光板的光线最多。
  11. 根据权利要求9所述的背光模组，其中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面具有固定的斜率。
  12. 根据权利要求9所述的背光模组，其中，所述接触斜面由所述支撑底面上的部分凹陷形成，该接触斜面为一曲面。
  13. 根据权利要求9所述的背光模组，其中，所述接触斜面由所述支撑底面整体倾斜形成，且该接触斜面具有固定的斜率。
  14. 根据权利要求9所述的背光模组，其中，所述支撑斜面包括第一支撑斜面和第二支撑斜面，所述第一支撑斜面和所述第二支撑斜面的倾斜方向相反。
  15. 根据权利要求9所述的背光模组，其中，在所述导光板沿着所述重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱还沿着与所述重力方向相反的方向支撑所述导光板。
  16. 根据权利要求9所述的背光模组，其中，设置于所述光源和所述导光板之间的定位柱的数目有两个，该两个定位柱分别设置于所述长条形光源的两端，并设置于所述光源和所述导光板之间。
  17. 根据权利要求9所述的背光模组，其中，所述背光模组还包括背板，所述支撑柱固定设置在所述背板上。
  18. 一种液晶显示器，其中，所述液晶显示器包括一背光模组，所述背光模组包括导光板和光源，所述导光板包括反射面和出光面，所述反射面和所述出光面之间包括两底面以及两侧面，上述两底面包括一支撑底面；所述光源为长条形，并对应导光板的其中一侧面设置；
    所述背光模组还包括有支撑柱，所述支撑底面设置有接触斜面，所述支撑柱贴合所述接触斜面；
    其中，一重力方向为平行于所述光源的长度方向，在所述导光板沿着其重力方向发生变化时，与所述支撑柱之间产生力的作用，在该力的作用下，所述支撑柱将所述导光板推向所述光源。
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CN104654128B (zh) * 2014-12-26 2017-11-07 深圳市华星光电技术有限公司 背光模组及显示装置
CN104806931B (zh) 2015-05-19 2017-10-24 合肥京东方显示光源有限公司 一种背光模组和显示装置

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