WO2017088390A1 - 背光装置 - Google Patents

背光装置 Download PDF

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Publication number
WO2017088390A1
WO2017088390A1 PCT/CN2016/083050 CN2016083050W WO2017088390A1 WO 2017088390 A1 WO2017088390 A1 WO 2017088390A1 CN 2016083050 W CN2016083050 W CN 2016083050W WO 2017088390 A1 WO2017088390 A1 WO 2017088390A1
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Prior art keywords
led lamp
light
guide plate
light guide
backlight device
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PCT/CN2016/083050
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English (en)
French (fr)
Inventor
贾智帅
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乐视控股（北京）有限公司
乐视致新电子科技（天津）有限公司
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Priority to US15/240,107 priority Critical patent/US20170153381A1/en
Publication of WO2017088390A1 publication Critical patent/WO2017088390A1/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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • 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
    • G02B6/0073—Light emitting diode [LED]

Definitions

  • the present invention relates to a backlight device, and more particularly to a backlight device in which light rays are transmitted in a rectangular shape.
  • 3D technology has two types: FPR (ie, non-flash 3D technology) and shuttle glass (ie, shutter type 3D technology), among which FPR is expensive.
  • FPR non-flash 3D technology
  • shuttle glass ie, shutter type 3D technology
  • FPR is expensive.
  • the Shuttle glass has a blinking backlight (ie, a flashing backlight) and a scanning backlight (ie, a scanning backlight).
  • the scanning backlight works well, but the scanning backlight still has crosstalk and ghosting problems.
  • the light emitted by the LED of the first region i.e., the light emitting diode
  • the region 1 of the light guide plate i.e., LGP
  • the light emitted by each zone needs to be transmitted in its own area without being diverged to adjacent areas.
  • the light emitted by the LED is fan-shaped, and it is impossible to be a rectangle in FIG. 1, and the fan shape may cause crosstalk.
  • the prism shape of the LED is currently reduced by the prism structure on the light guide plate, but the rectangular requirement is still not achieved.
  • An object of embodiments of the present invention is to provide a backlight device.
  • a backlight device for improving a 3D effect comprising an LED lamp and a light guide plate, the light guide plate being placed beside the LED lamp for receiving light emitted by the LED lamp, the LED lamp comprising an adjacently disposed white LED lamp and an ultraviolet LED lamp a phosphor layer is disposed on the light guide plate, and the phosphor layer is located on the light guide plate The part corresponding to the ultraviolet light LED.
  • a prism structure is disposed on the light guide plate, and the prism structure is located on a portion of the light guide plate corresponding to the corresponding white LED lamp.
  • the prism structure includes a plurality of triangular prisms.
  • a fluorescent powder capable of generating white light is present in the phosphor layer.
  • the white LED lamp and the ultraviolet LED lamp are spaced apart from each other.
  • a plurality of prism structures corresponding to the white LED lamps are disposed on the light guide plate.
  • a plurality of phosphor layers corresponding to the ultraviolet LED lamps are disposed on the light guide plate.
  • the prism structure is disposed on the light guide plate corresponding to the white LED lamp, the horizontal light can be concentrated, so that the generated white light does not excite the phosphor on the light guide plate in other regions;
  • 1 is a schematic view showing the distribution of a light guide plate of a conventional scanning backlight
  • Figure 2 is a view of the actual effect of Figure 1;
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 4 is a schematic view showing the distribution of a light guide plate in the present invention.
  • Fig. 5 is a cross-sectional view taken along line B-B of Fig. 4;
  • a backlight device for improving the 3D effect of the present invention comprising an LED lamp and a light guide plate 3 (ie, LGP) placed beside the LED lamp.
  • the light guide plate can receive the light emitted by the LED light.
  • the LED lamp includes a white LED lamp 1 that emits white light and an ultraviolet LED lamp 2 that emits ultraviolet light.
  • the white LED lamp 1 is disposed adjacent to the ultraviolet LED lamp 2.
  • the light guide plate 3 is provided with a prism structure 31 and a phosphor layer 32.
  • the prism structure 31 and the phosphor layer 32 are respectively located on the light guide plate 3 corresponding to the corresponding white LED lamp 1 and the ultraviolet LED lamp 2.
  • the light emitted by the white LED lamp 1 and the ultraviolet LED lamp 2 propagates straight through the prism structure 31 and the phosphor layer 32 on the light guide plate, and the light forms a rectangular propagation in the backlight device, thereby avoiding the generation of the adjacent LED lamps.
  • the light interferes with each other to form a fan shape, which improves the quality of the 3D picture.
  • the phosphor layer 32 on the light guide plate 3 corresponding to the ultraviolet light LED lamp 2 has a phosphor therein, and the phosphor can generate white light. Since the ultraviolet light of the ultraviolet LED lamp 2 is not visible, even if the ultraviolet light generated by the ultraviolet LED lamp 2 is diverged to the adjacent white LED lamp 1, it is not perceived by the human eye. It can be considered that the light emitted by the ultraviolet light propagates only in the phosphor layer 32 of the light guide plate, and the light still has a rectangular propagation.
  • the prism structure 31 on the light guide plate 3 corresponding to the white LED lamp 1 includes a plurality of triangular prisms which can be laterally condensed to reduce the fan angle.
  • the phosphor on the light guide plate 3 is not excited by the white light, so the ultraviolet light LED lamp receiving the white light does not generate light, and thus It is considered that the light of the white LED lamp 1 is only partially propagated within the prism structure of the light guide plate, so that the light of the backlight device can exhibit a rectangular propagation.
  • a plurality of white LED lamps 1 and ultraviolet LED lamps 2 are provided.
  • the white LED lamp 1 and the ultraviolet LED lamp 2 are spaced apart from each other.
  • the light guide plate 3 is provided with a plurality of prism structures 31 and a phosphor layer 32 corresponding to the white LED lamp 1 and the ultraviolet LED lamp 2, wherein the number of the prism structures 31 disposed on the light guide plate 3 and the white LED lamp 1 are The number is the same, and the number of the phosphor layers 32 provided on the light guide plate 3 is the same as the number of the ultraviolet light LED lamps 2.
  • Zone 1 and 4 layers of ultraviolet LED lamps 2 are respectively disposed, which are spaced apart in eight regions of the light guide plate 3.
  • Zone 1, Zone 3, Zone 5, Zone 7 are prism junctions.
  • Zones 2, 4, 6 and 8 are phosphor layers corresponding to the ultraviolet LED lamps 2 for receiving ultraviolet light emitted by the ultraviolet LED lamps 2.
  • the ultraviolet light emitted by the ultraviolet LED lamp 2 is invisible, even if the ultraviolet light which should be emitted to the 2nd, 4th, 6th, and 8th regions is diverged to the adjacent 1st, 3rd, 5th, and 7th zones, Will not be noticed.
  • the white light generated by the white LED lamp 1 is emitted to the 1st, 3rd, 5th, and 7th regions of the light guide plate, and part of the white light is diverged to the adjacent 2nd, 4th, 6th, and 8th zones. Since the phosphor layer 32 is disposed on the light guide plate 3 of the 2nd zone, the 4th zone, the 6th zone, and the 8th zone, the phosphor powder is not excited by the white light, so the 2nd zone, the 4th zone, the 6th zone, and the 8th zone do not generate light. . Therefore, the light in the eight regions propagates in a straight line, and the light of the backlight device is rectangularly propagated.
  • the backlight device for improving the 3D effect of the present invention can be laterally condensed because the prism structure corresponding to the white light LED lamp is disposed on the light guide plate, so that the generated white light does not excite the phosphor on the light guide plate in other regions.
  • Invisible ultraviolet light does not affect the picture even if it is scattered to other areas of the light guide plate; since the light emitted by each area LED is linear in the light guide plate of each area, it can present a rectangular propagation instead of a fan shape. Therefore, crosstalk is reduced, thereby improving the quality of the 3D picture.

Abstract

一种背光装置，包括LED灯和导光板（3），导光板（3）放置在LED灯旁边用于接收LED灯散发出的光，LED灯包括相邻设置的白光LED灯（1）和紫外光LED灯（2），导光板（3）上设置有荧光粉层（32），荧光粉层（32）位于导光板（3）上与紫外光LED灯（2）对应的部分。

Description

背光装置
相关申请的交叉参考
本申请要求于2015年11月27日提交中国专利局、申请号为201520970922.5、名称为“一种用于提高3D效果的背光装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种背光装置，尤其涉及一种光线呈矩形传播的背光装置。
背景技术
目前3D技术有FPR(即不闪式3D技术)和shuttle glass(即快门式3D技术)两种，其中，FPR价格昂贵。而Shuttle glass具有blinking backlight(即闪烁背光)和scanning backlight(即扫描背光)两种。scanning backlight效果较好，但scanning backlight依然有串扰、存在重影的问题。
如图1所示，为保证3D效果，理论上1区的LED(即为发光二极管)发出的光完全在导光板(即为LGP)的1区传播，而不会到达相邻的2区。同理，需要每个区发出的光在各自的区域里传播，而不发散到相邻区域。然而如图2所示，实际上LED发出的光为扇形，不可能为图1中的矩形，而扇形会导致串扰。如图3所示，目前通过导光板上的棱镜结构，使LED的扇形角度尽量减小，但是仍然达不到矩形的要求。
发明内容
本发明实施例的目的在于提供一种背光装置。
为实现上述目的，本发明实施例的背光装置的具体技术方案为：
一种用于提高3D效果的背光装置，包括LED灯和导光板，导光板放置在LED灯旁边用于接收LED灯散发出的光，LED灯包括相邻设置的白光LED灯和紫外光LED灯，导光板上设置有荧光粉层，荧光粉层位于导光板 上与紫外光LED灯对应的部分。
进一步，导光板上设置有棱镜结构，棱镜结构位于导光板上与对应白光LED灯对应的部分。
进一步，棱镜结构包括多个呈三角形的棱镜。
进一步，荧光粉层内具有可产生白光的荧光粉。
进一步，白光LED灯设置有多个。
进一步，紫外光LED灯设置有多个。
进一步，白光LED灯与紫外光LED灯相互间隔设置。
进一步，导光板上设置有多个与白光LED灯相对应的棱镜结构。
进一步，导光板上设置有多个与紫外光LED灯相对应的荧光粉层。
本发明实施例的优点在于：
1)由于对应白光LED灯的导光板上设置有棱镜结构，可横向聚光，因此产生的白光不会激发至其他区域的导光板上的荧光粉；
2)不可见的紫外光即便发散到导光板的其他区域也不会影响画面；
3)由于每个区域LED发出的光在各自区域的导光板上均为直线型，可呈现矩形的传播，而不是扇形，因此减小了串扰，从而提高了3D画面的品质。
附图概述
图1为现有的扫描背光的导光板的分布示意图；
图2为图1的实际效果图；
图3为图1中的A-A向的剖视图；
图4为本发明中的导光板的分布示意图；
图5为图4中的B-B向的剖视图。
本发明的较佳实施方式
为了更好的了解本发明的目的、结构及功能，下面结合附图，对本发明的实施例做进一步详细的描述。
如图4和图5所示，其示出本发明一种用于提高3D效果的背光装置，包括LED灯和放置在LED灯旁边的导光板3(即为LGP)。导光板可接收LED灯散发出的光。LED灯包括可散发出白光的白光LED灯1和可散发出紫外光的紫外光LED灯2。白光LED灯1与紫外光LED灯2相邻设置。导光板3上设置有棱镜结构31和荧光粉层32，棱镜结构31和荧光粉层32分别位于导光板3上与对应白光LED灯1和与紫外光LED灯2对应的部分。白光LED灯1与紫外光LED灯2发出的光通过导光板上的棱镜结构31和荧光粉层32后呈直线传播，在背光装置内光形成矩形的传播，从而避免了相邻LED灯产生的光线相互干扰形成扇形，提升了3D画面的品质。
进一步，与紫外光LED灯2相对应的导光板3上的荧光粉层32内具有荧光粉，荧光粉可产生白光。由于紫外光LED灯2的紫外光不可见，所以即使紫外光LED灯2产生的紫外光发散到相邻的白光LED灯1上，也不会被人眼感知。可认为紫外光发出的光仅在导光板的荧光粉层32部分传播，光线仍呈现矩形的传播。
进一步，与白光LED灯1相对应的导光板3上的棱镜结构31包括多个呈三角形的棱镜，可横向聚光，减小扇形角度。当白光LED灯1产生的白光发散到相邻的紫外光层2上时，导光板3上的荧光粉因不会被白光激发，所以接收到白光的紫外光LED灯不会产生光，进而可认为白光LED灯1的光只会在导光板的棱镜结构内进行部分传播，因此背光装置的光线可呈现矩形的传播。
此外，本发明中白光LED灯1与紫外光LED灯2均设置有多个。白光LED灯1与紫外光LED灯2相互间隔设置。导光板3上设置有多个与白光LED灯1和紫外光LED灯2相对应的棱镜结构31和荧光粉层32，其中，导光板3上设置的棱镜结构31的数量与白光LED灯1的数量相同，导光板3上设置的荧光粉层32的数量与紫外光LED灯2的数量相同。
例如，本发明中分别设置有四层白光LED灯1与四层紫外光LED灯2，间隔分布在导光板3的八个区域内。其中，1区、3区、5区、7区为棱镜结 构，与白光LED灯1相对应，用于接收白光LED灯1散发出的光。2区、4区、6区、8区为荧光粉层，与紫外光LED灯2相对应，用于接收紫外光LED灯2散发出的紫外光。
由于紫外光LED灯2散发出的紫外光不可见，因此即使应散发至2区、4区、6区、8区的紫外光发散至相邻的1区、3区、5区、7区时也不会被察觉。
白光LED灯1产生的白光散发至导光板的1区、3区、5区、7区，而其中的部分白光会发散至相邻的2区、4区、6区、8区中。因2区、4区、6区、8区的导光板3上设置有荧光粉层32，其中的荧光粉不会被白光激发，所以2区、4区、6区、8区不会产生光。因此八个区域内的光线均呈直线传播，背光装置的光线呈现矩形的传播。
本发明的一种用于提高3D效果的背光装置，由于对应白光LED灯的导光板上设置有棱镜结构，可横向聚光，因此产生的白光不会激发至其他区域的导光板上的荧光粉；不可见的紫外光即便发散到导光板的其他区域也不会影响画面；由于每个区域LED发出的光在各自区域的导光板上均为直线型，可呈现矩形的传播，而不是扇形，因此减小了串扰，从而提高了3D画面的品质。
以上借助具体实施例对本发明做了进一步描述，但是应该理解的是，这里具体的描述，不应理解为对本发明的实质和范围的限定，本领域内的普通技术人员在阅读本说明书后对上述实施例做出的各种修改，都属于本发明所保护的范围。

Claims (9)

  1. 一种背光装置，包括LED灯和导光板，导光板放置在LED灯旁边用于接收LED灯散发出的光，其特征在于，LED灯包括相邻设置的白光LED灯和紫外光LED灯，导光板上设置有荧光粉层，荧光粉层位于导光板上与紫外光LED灯对应的部分。
  2. 根据权利要求1所述的背光装置，其特征在于，导光板上设置有棱镜结构，棱镜结构位于导光板上与对应白光LED灯对应的部分。
  3. 根据权利要求2所述的背光装置，其特征在于，棱镜结构包括多个呈三角形的棱镜。
  4. 根据权利要求1所述的背光装置，其特征在于，荧光粉层内具有可产生白光的荧光粉。
  5. 根据权利要求1所述的背光装置，其特征在于，设置有多个白光LED灯。
  6. 根据权利要求1所述的背光装置，其特征在于，设置有多个紫外光LED灯。
  7. 根据权利要求1或5或6所述的背光装置，其特征在于，白光LED灯与紫外光LED灯相互间隔设置。
  8. 根据权利要求2或3所述的背光装置，其特征在于，导光板上设置有多个与白光LED灯相对应的棱镜结构。
  9. 根据权利要求1或4所述的背光装置，其特征在于，导光板上设置有多个与紫外光LED灯相对应的荧光粉层。
PCT/CN2016/083050 2015-11-27 2016-05-23 背光装置 WO2017088390A1 (zh)

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