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CN103292209B - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
CN103292209B
CN103292209B CN201210052861.5A CN201210052861A CN103292209B CN 103292209 B CN103292209 B CN 103292209B CN 201210052861 A CN201210052861 A CN 201210052861A CN 103292209 B CN103292209 B CN 103292209B
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Prior art keywords
light
optical fiber
backlight module
shutter
optical
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Expired - Fee Related
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CN103292209A (zh
Inventor
林厚德
张超雄
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Shenzhen Tongxingda Technology Co Ltd
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Scienbizip Consulting Shenzhen Co Ltd
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Priority to CN201210052861.5A priority Critical patent/CN103292209B/zh
Priority to TW101108975A priority patent/TWI468804B/zh
Priority to US13/714,311 priority patent/US8985826B2/en
Publication of CN103292209A publication Critical patent/CN103292209A/zh
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • 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
    • G02F1/133601—Illuminating devices for spatial active dimming

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

一种背光模组，包括光源及对应设置于光源上的光纤，所述光纤包括芯体及包覆于所述芯体外表面的包覆层，所述包覆层上贯穿设有入光口及光闸，所述光源面向所述入光口设置，所述光源发出的光线经由所述入光口进入所述光纤内，再由所述光闸射出所述光纤外，每一光闸处对应设有快门，每一快门对应覆盖于一光闸的上方，该快门经由电路控制装置控制开关状态，用以控制该光闸处是否出光。该背光模组通过光源与光纤配合，所述光源发出的光线在光纤的芯体及包覆层的共同作用下均匀分配至每一光闸处，再由每一个光闸处对应向外射出光线，从而有效利用光源发出的光线以形成较宽的光场，使得背光模组不易使液晶显示器上出现光点或亮暗带。

Description

背光模组
技术领域
本发明涉及液晶显示领域，尤其涉及一种液晶显示装置的背光模组。
背景技术
由于液晶显示器具有轻、薄、耗电小等优点，广泛应用于笔记本计算机、移动电话、个人数字助理等现代化信息设备。因为液晶本身不具有发光特性，因此需要为其提供背光模组以实现显示功能。
一种常见的背光模组包括一背板及设于该背板上的若干发光二极管（light-emitting diode, LED），该背板呈平板状，发光二极管呈阵列状固定于该背板上。这种背光模组需设置较多的发光二极管的颗数，因此制造成本较高。并且，每一发光二极管均为点光源，这样容易使液晶显示器出现光点或亮暗带(mura)的问题。
发明内容
有鉴于此，实有必要提供一种在保证出光均匀的前提下可降低成本的背光模组。
一种背光模组，包括光源及对应设置于光源上的光纤，所述光纤包括芯体及包覆于所述芯体外表面的包覆层，所述包覆层上贯穿设有入光口及光闸，所述光源面向所述入光口设置，所述光源发出的光线经由所述入光口进入所述光纤内，再由所述光闸射出所述光纤外，每一光闸处对应设有快门，每一快门对应覆盖于一光闸的上方，该快门经由电路控制装置控制开关状态，用以控制该光闸处是否出光。
一种背光模组，包括背板及设于背板上的光源，还包括设于所述背板上的光纤，所述光纤包括芯体及包覆于所述芯体外表面的包覆层，所述包覆层上贯穿设有入光口及光闸，所述光纤具有相对设置的顶面及底面，所述入光口开设于所述底面上，所述光闸开设于所述顶面上，所述光纤的底面朝向所述背板，且所述光源面向所述入光口设置，所述光源发出的光线经由所述入光口进入所述光纤内，再由所述光闸射出所述光纤外。
本发明中的背光模组通过光源与光纤配合，所述光源发出的光线在光纤的芯体及包覆层的共同作用下均匀分配至每一光闸处，再由每一个光闸处对应向外射出光线，从而有效利用光源发出的光线以形成较宽的光场，使得背光模组不易使液晶显示器上出现光点或亮暗带。
附图说明
图1为本发明第一实施例的背光模组的立体组装图。
图2为图1所示的背光模组的立体分解图。
图3为图1所示的背光模组沿III-III的剖面示意图。
图4为本发明第二实施例的背光模组的立体分解图。
图5为图4所示的背光模组剖面示意图。
图6为本发明第三实施例的背光模组的剖面示意图。
主要元件符号说明
背光模组 100，100a，100b
背板 10，10a
凹槽 11
光纤 20，20a，20b
底面 201
顶面 202
芯体 21，21b
包覆层 22，22b
光闸 221，221a，221b
入光口 222，222a
光源 30
快门 40
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
请参阅图1及图2，所示为本发明第一实施例中的背光模组100，该背光模组100包括一背板10、设于该背板10上的若干光纤20及设于该背板10与该光纤20之间的若干光源30。
所述背板10呈矩形，该背板10上间隔开设有若干矩形的凹槽11，所述凹槽11用于收容所述光源30。每一凹槽11的深度小于该背板10的厚度。该背板10优选用导热性材料制成，如金属或陶瓷等，以便于散发光源30所产生的热量。
请同时参阅图3，该光纤20包括芯体21及包覆芯体21外表面上的包覆层22。所述光纤20的形状相同，均大致呈纵长四棱台状。所述光纤20相互平行排列于该背板10上。该光纤20在面积上相对较小的一端面即其底面201贴合于该背板10上且正对该背板10上的一光源30。该光纤20在面积上相对较大的另一端即其顶面202与该背板10平行。该顶面202上开设有若干光闸221，所述光闸221均为具有一定深度的盲孔。在本实施例中，所述光闸221形成于所述包覆层22上且贯穿该包覆层22，该包覆层22于该光纤20的底面201中部设有一入光口222，该入光口222正对该光纤20所对应的光源30。所述光闸221于光纤20的顶面202上呈矩阵排列。该顶面202上对应所述光闸221处设有若干快门40，每一快门40刚好覆盖于对应的一光闸221上方，该快门40经由电路控制装置（图未示）控制开关状态，用以实现控制对应光闸221处是否出光，这样可根据实际需要于液晶显示器上形成局部区域控光（local dimming），从而可提高液晶显示器的亮度对比效果。
所述光源30可选用高功率的金属卤素、或氙灯以及发光二极管，该光源30的出光角度为120度以上。在本实施例中，所述光源30为发光二极管。该发光二极管可以为单色发光二极管，如发红光或蓝光的发光二极管，也可以为蓝光发光二极管配以黄色荧光粉的发混合白光的发光二极管。该光源30发出的光线经由入光口222进入光纤20中，在光纤20中经多次反射及折射后自所述光闸221处射出，从而于光纤20的顶面202形成一面光源。
上述实施例中的背光模组100通过光源30与光纤20配合，所述光源30发出的光线在光纤20的芯体21及包覆层22的共同作用下均匀分配至每一光闸221处，再由每一个光闸221处对应向外射出光线，从而有效利用光源30发出的光线以形成较宽的光场，使得背光模组不易使液晶显示器上出现光点或亮暗带。
本发明不限于上述设计，图4及图5示出了本发明第二实施例中的背光模组100a，其与第一实施例中的背光模组100相似，不同之处在于该背光模组100a中，每一光纤20a正对多个光源30，在本实施例中为三个。所述三个光源30呈线性排列于该背光模组100a的背板10a上。每一光纤20a上设有三个入光口222a，每一入光口222a处设有一光源30。所述三个光源30分别发出不同颜色的光，三种不同颜色的光在该光纤20a内部充分混合，从而可使可使该光纤20a的光闸221a处射出具有较佳混光效果的混光，例如，当所述三个光源30分别为红光发光二极管、绿光发光二极管及蓝光发光二极管时，每一光闸221a处可射出较均匀的白光。在其他的实施例中，所述三个光源30也可以为同种颜色的光源。
图6示出了本发明第三实施例中的背光模组100b，，其与第一实施例中的背光模组100相似，不同之处在于该背光模组100b的每一光纤20b正对多个光源30，在本实施例中为两个，且所述多个光源30嵌合于该光纤20b的芯体21b中。如此，可进一步减少光线泄露，提高光源30的光利用率。
应该指出，上述实施方式仅为本发明的较佳实施方式，本领域技术人员还可在本发明精神内做其它变化。这些依据本发明精神所做的变化，都应包含在本发明所要求保护的范围之内。

Claims (6)

1.一种背光模组，包括光源及对应设置于光源上的光纤，所述光纤包括芯体及包覆于所述芯体外表面的包覆层，其特征在于：所述包覆层上贯穿设有入光口及光闸，所述光纤具有相对设置的顶面及底面，所述入光口开设于所述底面上，所述光闸开设于所述顶面上，所述光源面向所述入光口设置，所述光源发出的光线经由所述入光口进入所述光纤内，再由所述光闸射出所述光纤外，所述光闸处对应设有快门，每一快门对应覆盖于一光闸的上方，该快门经由电路控制装置控制开关状态，用以控制该光闸处是否出光，所述背光模组还包括背板，所述背板上开设有凹槽，所述凹槽用于对应收容所述光源，所述光纤的底面贴设于所述背板上，且所述入光口正对所述凹槽。
2.如权利要求1所述的背光模组，其特征在于：所述光纤顶面的面积大于所述光纤底面的面积。
3.如权利要求2所述的背光模组，其特征在于：所述光纤呈四棱台状，所述顶面及底面为四棱台的两相对端面。
4.如权利要求1所述的背光模组，其特征在于：所述光纤为多个，这些光纤相互平行排列于同一平面内。
5.如权利要求1所述的背光模组，其特征在于：所述光闸于光纤的顶面上呈矩阵排列。
6.如权利要求1所述的背光模组，其特征在于：所述光源包括三个分光源，所述三个分光源分别为红光发光二极管、绿光发光二极管及蓝光发光二极管。
CN201210052861.5A 2012-03-02 2012-03-02 背光模组 Expired - Fee Related CN103292209B (zh)

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CN201210052861.5A CN103292209B (zh) 2012-03-02 2012-03-02 背光模组
TW101108975A TWI468804B (zh) 2012-03-02 2012-03-16 背光模組
US13/714,311 US8985826B2 (en) 2012-03-02 2012-12-13 Backlight module having optcial fiber

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US20130229822A1 (en) 2013-09-05
CN103292209A (zh) 2013-09-11
US8985826B2 (en) 2015-03-24
TW201337411A (zh) 2013-09-16
TWI468804B (zh) 2015-01-11

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