WO2013034078A1 - 直下式背光源装置及显示装置 - Google Patents

直下式背光源装置及显示装置 Download PDF

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Publication number
WO2013034078A1
WO2013034078A1 PCT/CN2012/081018 CN2012081018W WO2013034078A1 WO 2013034078 A1 WO2013034078 A1 WO 2013034078A1 CN 2012081018 W CN2012081018 W CN 2012081018W WO 2013034078 A1 WO2013034078 A1 WO 2013034078A1
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WIPO (PCT)
Prior art keywords
light
type backlight
prism
direct type
backlight device
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PCT/CN2012/081018
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English (en)
French (fr)
Inventor
周昊
马青
尹大根
尚飞
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北京京东方光电科技有限公司
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Application filed by 北京京东方光电科技有限公司 filed Critical 北京京东方光电科技有限公司
Priority to US13/703,104 priority Critical patent/US20130148329A1/en
Publication of WO2013034078A1 publication Critical patent/WO2013034078A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • 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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present disclosure relates to a direct type LED backlight device and a display device. Background technique
  • the backlight is an important technical point that affects the display effect of the display.
  • LE-Cap Light Enhancer Cap
  • the light mixing distance is such that the thickness of the direct type backlight is reduced. This meets the thin and light concept of display development.
  • the guide post 101 is made of a non-light-conducting material, so that the light at a position where the tip end of the guide post 101 is in contact with the diffuser plate 102 cannot be transmitted, causing a dark spot at the contact position, which affects the subjective display of the display screen. effect.
  • a direct type backlight device including a back plate, a plurality of light emitting units disposed on the back plate, and a diffusion plate above the light emitting unit, wherein at least one of the light emitting units is provided at an upper end thereof A transparent pillar for supporting the diffuser plate.
  • the light emitting unit is composed of a light source lamp and a light reinforced prism, wherein the light source lamp and the light reinforced prism are both fixed on the back plate, and the light source lamp is placed under the light reinforced prism, and the transparent struts are placed on the light reinforced prism.
  • the pillar and the light reinforced prism are integrated.
  • the light-emitting unit with a transparent pillar is located in an intermediate portion of the backboard.
  • the light source lamp can be an LED lamp.
  • the direct type backlight device may further include an optical module on the diffusion plate,
  • the optical module includes a polarizing film, a prism film, and a diffusion film.
  • a display device including the above-described direct type backlight device according to an embodiment of the present disclosure.
  • the occurrence of dark spots is avoided by providing a transparent pillar at the upper end of the light emitting unit. Further, when the transparent pillars are integrally formed on the light-reinforcing prism in the light-emitting unit, the number of parts can be reduced and the assembly step can be reduced.
  • FIG. 1 is a structural view of a conventional direct type backlight device
  • 2 is an optical effect diagram of a conventional direct type backlight device
  • FIG. 3 is a structural diagram of a direct type backlight device according to an embodiment of the present disclosure.
  • FIG. 4 is an optical effect diagram of a direct type backlight device according to an embodiment of the present disclosure
  • FIG. 5 is another optical effect diagram of a direct type backlight device according to an embodiment of the present disclosure.
  • a direct type backlight device includes a back plate 1, a plurality of light emitting units disposed on the back plate 1, and a diffusing plate 2 above the light emitting unit. At least one of the upper ends of the light-emitting unit is provided with a transparent pillar 3, and the transparent pillar 3 supports the diffusion plate 2.
  • the direct type backlight device may further include an optical module located above the diffusion plate 2, and the optical module may include a polarizing film 7, a prism film 8, and a diffusion film 9.
  • the diffusion film 9, the prism film 8, and the polarizing film 7 are sequentially arranged from the bottom to the top of the diffusion plate.
  • the light emitting unit is composed of a light source lamp 4 and a light reinforced prism 5.
  • the light source lamp 4 can be an LED lamp.
  • the light source lamp 4 and the light reinforced prism 5 are both fixed on the back plate 1, and the light source lamp 4 is placed under the light intensity prism 5.
  • the transparent pillar 3 is placed on the light-reinforcing prism 5.
  • the transparent strut 3 may be formed integrally with the light-reinforcing prism 5, for example, by an integral molding process.
  • the transparent strut 3 is located at an intermediate position at the top of the light-emitting unit, that is, the transparent strut 3 is placed at an intermediate position at the top of the light-reinforcing prism 5, so that the light passing through the light-reinforcing prism 5 is uniformly projected.
  • the use of the transparent pillar 3 enables the light to be completely irradiated onto the diffusion plate 2, There will be no dark spots like the original structure.
  • the transparent struts 3 can be arranged continuously or spaced apart on the light reinforced prism 5 to achieve the desired effect.
  • the backlight module can be supported, a small number of light-emitting units with transparent pillars 3 are used as much as possible.
  • the light-emitting unit with the transparent pillar 3 is located at an intermediate portion of the back panel, and the peripheral side of the back panel can be supported by the outer frame.
  • Embodiments of the present disclosure also provide a display device, which may be a display device for a tablet computer, a display, a liquid crystal television, or the like.
  • the display device includes a direct type backlight device in accordance with an embodiment of the present disclosure.
  • the direct type backlight device includes a back plate 1, a plurality of light emitting units disposed on the back plate 1, and a diffusing plate 2 above the light emitting unit. At least one of the upper ends of the light-emitting unit is provided with a transparent pillar 3, and the transparent pillar 3 supports the diffusion plate 2.
  • the direct type backlight device may further include an optical module located above the diffusion plate 2, and the optical module may include a polarizing film 7, a prism film 8, and a diffusion film 9.
  • the diffusion film 9, the prism film 8, and the polarizing film 7 are sequentially arranged from the bottom to the top of the diffusion plate.
  • the light emitting unit may be composed of a light source lamp 4 and a light reinforced prism 5.
  • the light source lamp 4 can be an LED lamp.
  • the light source lamp 4 and the light reinforced prism 5 are both fixed on the back plate 1, and the light source lamp 4 is placed under the light reinforced prism 5.
  • the transparent pillar 3 is placed on the light-reinforcing prism 5.
  • the transparent strut 3 may be formed integrally with the light-reinforcing prism 5, for example, by an integral molding process.
  • the transparent strut 3 is located at an intermediate position at the top of the light-emitting unit, i.e., the transparent strut 3 is placed at an intermediate position at the top of the light-reinforcing prism 5, so that the light passing through the light-reinforcing prism 5 is uniformly projected.
  • the use of the transparent struts 3 allows the light to be completely irradiated onto the diffuser 2 without appearing dark spots as in the original structure.
  • the transparent struts 3 can be arranged continuously or spaced apart on the light reinforced prism 5 to achieve the desired effect.
  • the backlight module can be supported, a small number of light-emitting units with transparent pillars 3 are used as much as possible.
  • the light-emitting unit with the transparent pillar 3 is located at an intermediate portion of the back panel, and the peripheral side of the back panel can be supported by the outer frame.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种直下式背光源装置及具有该直下式背光源装置的显示装置，所述直下式背光源装置包括背板（1）、布置在背板（1）上的多个发光单元、发光单元上方的扩散板（2），至少一个所述发光单元上端均设有透明支柱（3）以支撑所述扩散板（2）。

Description

直下式背光源装置及显示装置 技术领域
本公开涉及直下式 LED背光源装置及显示装置。 背景技术
在液晶显示屏中， 背光源是关系显示屏显示效果的重要技术点。 随着技 术的更新及市场对电视外观的要求越来越高， 目前电视用液晶显示屏正朝向 窄边框方向发展。在目前的背光源领域中， LE-Cap ( Light Enhancer Cap ) (光 强化棱镜 )技术通过在 LED光源灯上方增加光强化棱镜，减少了光源灯的个 数， 减小了光源灯到膜材的混光距离， 从而使直下式背光源的厚度减薄。 这 满足显示屏发展的轻薄理念。
如图 1、 图 2所示， 由于显示屏的尺寸较大， 背光源中间部位需要一定 数量的导柱（Lamp guide ) 101以支撑扩散板 102以及光学模组。 现有技术 中的该导柱 101由不导光材质制成，所以会导致导柱 101的尖端与扩散板 102 接触的位置光线无法透射出去， 造成该接触位置出现暗点， 影响显示屏主观 显示效果。 发明内容
根据本公开的实施例， 提供了一种直下式背光源装置， 其包括背板、 布 置在背板上的多个发光单元、 发光单元上方的扩散板， 其中至少一个所述发 光单元上端设有透明支柱， 用于支撑所述扩散板。
优选， 所述发光单元由光源灯和光强化棱镜构成， 所述光源灯和光强化 棱镜均固定在背板上， 且光源灯置于光强化棱镜下方， 所述透明支柱置于光 强化棱镜上。
优选， 所述支柱与所述光强化棱镜为一体结构。
优选， 所述带有透明支柱的发光单元位于所述背板的中间区域。
所述光源灯可以为 LED灯。
所述直下式背光源装置还可以包括位于所述扩散板上的光学模组， 所述 光学模组包括偏光膜、 棱镜膜以及扩散膜。
根据本公开的实施例， 还提供了一种显示装置， 其包括上述根据本公开 实施例的直下式背光源装置。
根据本公开实施例的直下式背光源装置和显示装置中， 通过在发光单元 上端设置透明支柱， 避免了暗点的出现。 此外， 当在发光单元中的光强化棱 镜上一体地形成透明支柱时， 还可以减少零件数量并减少组装步骤。 附图说明
图 1是现有的直下式背光源装置的结构图；
图 2是现有的直下式背光源装置的光学效果图；
图 3是根据本公开实施例的直下式背光源装置的结构图；
图 4是才艮据本公开实施例的直下式背光源装置的一种光学效果图； 图 5是才艮据本公开实施例的直下式背光源装置的另一种光学效果图。 具体实施方式
下面结合附图对本公开的实施例做详细描述。
如图 3所示， 根据本公开实施例的一种直下式背光源装置包括背板 1、 布置在背板 1上的多个发光单元、 发光单元上方的扩散板 2。 至少一个所述 发光单元上端设有透明支柱 3 , 所述透明支柱 3支撑所述扩散板 2。
所述直下式背光源装置还可以包括位于扩散板 2上方的光学模组， 所述 光学模组可以包括偏光膜 7、棱镜膜 8以及扩散膜 9。 例如， 所述扩散板上方 从下到上依次为扩散膜 9、 棱镜膜 8和偏光膜 7。
所述发光单元由光源灯 4和光强化棱镜 5构成。所述光源灯 4可以为 LED 灯。 所述光源灯 4和光强化棱镜 5均固定在背板 1上， 且光源灯 4置于光强 化棱镜 5下方。 所述透明支柱 3则置于光强化棱镜 5上。
为了减少组装步骤， 所述透明支柱 3可与所述光强化棱镜 5形成为一体 结构， 例如通过整体模塑工艺。
在一些例子中， 所述透明支柱 3位于所述发光单元顶部的中间位置上， 即透明支柱 3放置于光强化棱镜 5顶部的中间位置上， 使得通过光强化棱镜 5的光线均匀投射。透明支柱 3的使用使得光线能够完全照射到扩散板 2上， 不会和原有的结构一样出现暗点。
如图 4-5所示， 所述透明支柱 3可连续布置或间隔布置在光强化棱镜 5 上， 均可达到所需效果。
在一些例子中， 只要能够对背光模组起到支撑作用， 尽可能的使用少量 的带透明支柱 3的发光单元。 优选， 所述带有透明支柱 3的发光单元位于所 述背板的中间区域， 而背板的周围边侧可通过外边框作为支撑。
本公开实施例还提供了一种显示装置，该显示装置可以是用于平板电脑、 显示器、 液晶电视等的显示装置。 该显示装置包括根据本公开实施例的直下 式背光源装置。 所述直下式背光源装置包括背板 1、 布置在背板 1上的多个 发光单元、 发光单元上方的扩散板 2。 至少一个所述发光单元上端设有透明 支柱 3 , 所述透明支柱 3支撑所述扩散板 2。
所述直下式背光源装置还可以包括位于所述扩散板 2上方的光学模组， 所述光学模组可以包括偏光膜 7、棱镜膜 8以及扩散膜 9。例如， 所述扩散板 上方从下到上依次为扩散膜 9、 棱镜膜 8和偏光膜 7。
所述发光单元可以由光源灯 4和光强化棱镜 5构成。 所述光源灯 4可以 为 LED灯。 所述光源灯 4和光强化棱镜 5均固定在背板 1上， 且光源灯 4 置于光强化棱镜 5下方。 所述透明支柱 3则置于光强化棱镜 5上。
为了减少组装步骤， 所述透明支柱 3可与所述光强化棱镜 5形成为一体 结构， 例如通过整体模塑工艺。
在一些例子中， 所述透明支柱 3位于所述发光单元顶部的中间位置上， 即透明支柱 3放置于光强化棱镜 5顶部的中间位置上， 使得通过光强化棱镜 5的光线均匀投射。透明支柱 3的使用使得光线能够完全照射到扩散板 2上， 不会和原有的结构一样出现暗点。
如图 4-5所示， 所述透明支柱 3可连续布置或间隔布置在光强化棱镜 5 上， 均可达到所需效果。
在一些例子中， 只要能够对背光模组起到支撑作用， 尽可能的使用少量 的带透明支柱 3的发光单元。 优选， 所述带有透明支柱 3的发光单元位于所 述背板的中间区域， 而背板的周围边侧可通过外边框作为支撑。
以上， 仅为本公开的较佳实施例， 本公开的保护范围并不局限于此。 任 何熟悉本技术领域的技术人员在本公开的技术范围内， 可轻易想到的变化或 替换， 都应涵盖在本公开的技术的保护范围之内。 因此， 本公开的技术的保 护范围应该以权利要求所界定的保护范围为准。

Claims

权利要求书
1、 一种直下式背光源装置， 包括背板、 布置在背板上的多个发光单元、 发光单元上方的扩散板， 其中： 至少一个所述发光单元上端设有透明支柱， 所述透明支柱支撑所述扩散板。
2、根据权利要求 1所述的直下式背光源装置， 其中： 所述发光单元由光 源灯和光强化棱镜构成， 所述光源灯和光强化棱镜均固定在背板上， 且光源 灯置于光强化棱镜下方， 所述透明支柱置于光强化棱镜上。
3、根据权利要求 2所述的直下式背光源装置， 其中： 所述支柱与所述光 强化棱镜为一体结构。
4、根据权利要求 1至 3中任一项所述的直下式背光源装置， 其中： 所述 带有透明支柱的发光单元位于所述背板的中间区域。
5、根据权利要求 2或 3所述的直下式背光源装置， 其中： 所述光源灯为 LED灯。
6、 根据权利要求 1 - 5中任一项所述的直下式背光源装置， 还包括位于 所述扩散板上的光学模组， 所述光学模组包括偏光膜、 棱镜膜以及扩散膜。
7、 一种显示装置， 其中， 所述显示装置包括如权利要求 1-6中任一所述 的直下式背光源装置。
PCT/CN2012/081018 2011-09-07 2012-09-05 直下式背光源装置及显示装置 WO2013034078A1 (zh)

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