WO2014201785A1 - 一种背光模组和显示装置 - Google Patents

一种背光模组和显示装置 Download PDF

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Publication number
WO2014201785A1
WO2014201785A1 PCT/CN2013/085141 CN2013085141W WO2014201785A1 WO 2014201785 A1 WO2014201785 A1 WO 2014201785A1 CN 2013085141 W CN2013085141 W CN 2013085141W WO 2014201785 A1 WO2014201785 A1 WO 2014201785A1
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WO
WIPO (PCT)
Prior art keywords
light
backlight module
guide plate
emitting unit
light guide
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PCT/CN2013/085141
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English (en)
French (fr)
Inventor
贾智帅
Original Assignee
京东方科技集团股份有限公司
北京京东方视讯科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方视讯科技有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2014201785A1 publication Critical patent/WO2014201785A1/zh

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Classifications

    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity

Definitions

  • the present invention belongs to the field of display technologies, and in particular, to a backlight module and a display device. Background technique
  • Liquid crystal displays are widely used for their excellent quality, but since the liquid crystal itself does not emit light, a backlight module is required to provide the light required for image display. In order to ensure better viewing from all angles, the liquid crystal display needs to meet the requirement of brightness uniformity, and thus the brightness of the outgoing light of the backlight module must be uniform.
  • the side-in backlight module has become the mainstream of backlight module design.
  • the light bar 2 has a plurality of LED (Light Emitting Diode) lamps 3, and the spacing between adjacent LED lamps 3 is A, due to the LEDs.
  • the lamp 3 has a certain illumination angle ⁇ , which results in a region 5 where the emitted light of the light bar is not covered at the edge portion of the light guide plate 1, that is, a hot spot, and the brightness of the dark region is weak, thereby causing the backlight mode.
  • the brightness of the emitted light of the group is not uniform.
  • the brightness of the dark areas is improved by providing dots on the lower surface of the dark area of the light guide plate, and the light reflected by the dots is used to compensate for the weaker brightness of the dark areas.
  • the present invention provides a backlight module and a display device with more uniform brightness.
  • the technical solution adopted to solve the technical problem of the present invention is a backlight module including a light guide plate and a plurality of point light sources, the light guide plate including a light incident surface, a light exit surface, a lower surface opposite to the light exit surface, and a vertical
  • the plurality of point light sources are disposed opposite to the light incident surface of the light guide plate on the two sides of the light exit surface and the light incident surface
  • the backlight module further includes light for illuminating the edge of the light guide plate adjacent to the light incident surface
  • the auxiliary light emitting unit is disposed opposite to at least one side of the light guide plate.
  • the plurality of point light sources are LED strips.
  • the light exit surface of the auxiliary light emitting unit is parallel to the side surface of the light guide plate.
  • a mesh point is provided on a lower surface of an edge portion of the light guide plate on which the emitted light of the point light source is not covered.
  • the dot density increases as the distance between the dot and the auxiliary light emitting unit increases
  • the area of the dots increases as the distance between the dots and the auxiliary lighting unit increases.
  • the auxiliary light-emitting unit is an ultraviolet light LED, and the light exit surface and/or the lower surface of the edge portion of the light guide plate not covered by the light source of the point light source is provided with phosphor.
  • the phosphor is a mixture of red, green and blue phosphors or a mixture of blue and yellow phosphors.
  • the density of the phosphor increases as the distance between the phosphor and the auxiliary illuminating unit increases.
  • the auxiliary lighting unit is a white LED lamp.
  • the backlight module provided by the present invention is provided with an auxiliary light-emitting unit outside the side of the light guide plate. Since the auxiliary light-emitting unit directly illuminates the edge portion of the light guide plate adjacent to the light incident surface, the light emitted by the light bar is not covered. The brightness of the area (i.e., the dark area) thus makes the brightness of the light emitted from the light guide plate more uniform.
  • the present invention also provides a display device comprising the above-described backlight module.
  • the display device of the present invention includes the above-described backlight module, the brightness of the display screen of the display device is more uniform, and the viewing effect is better.
  • FIG. 1 is a schematic diagram of a dark area forming mechanism of a light guide plate in the prior art
  • FIG. 2 is a schematic structural view of a backlight module in Embodiment 1;
  • FIG. 3 is a cross-sectional view taken along line B-B of the backlight module of FIG. 2.
  • FIG. 2 is a schematic structural view of a backlight module in the embodiment.
  • the backlight module in this embodiment includes a light guide plate 1, a plurality of point light sources 3, and an auxiliary light emitting unit 4.
  • the light guide plate 1 includes a light incident surface 13, a light guide plate edge portion 11 adjacent to the light incident surface 13, a light exit surface 14, a lower surface 15 opposite to the light exit surface 14, and a light incident surface 13 adjacent to the light exit surface 14 and sandwiched by the light exit surface 14 Two side faces 12 between the lower surface 15.
  • a plurality of point light sources are disposed opposite to the light incident surface 13 of the light guide plate 1.
  • the plurality of point light sources are preferably the light bar 2, more preferably a white light LED light bar (other light sources capable of emitting white light can be used instead of the white light LED light bar), and the light bar 2 includes a plurality of white LED lights 3 (each white light LED 3) Equivalent to a point source).
  • This embodiment is only described by taking a white LED lamp as an example.
  • the type of the point light source is not limited to a white LED lamp, and may be a blue LED lamp or other types of point light sources.
  • the backlight module further includes an auxiliary light emitting unit 4 for emitting light toward the edge portion 11 of the light guide plate adjacent to the light incident surface 13, and the auxiliary light emitting unit 4 is disposed opposite to at least one side of the light guide plate 1.
  • the auxiliary light emitting unit 4 may be disposed opposite to the side surface 12 perpendicular to the light incident surface 13 and the light exit surface 14, as shown in Fig. 2.
  • the auxiliary light-emitting unit 4 may be disposed to face the light exit surface 14 or the lower surface 15, and in this case, the light guide strip is preferably disposed such that the light-emitting direction of the auxiliary light-emitting unit 4 corresponds to the dark portion of the light guide plate.
  • a plurality of auxiliary lighting units 4 may be provided and disposed at appropriate locations including, but not limited to, the above-described positions, depending on the specific application conditions of the backlight module.
  • a mesh point 7 is provided on the lower surface 15 of the region 5 (i.e., the dark region) where the light emitted from the light bar is not covered.
  • the dark area 5 can be illuminated by more reflected light, thereby increasing the brightness of the area.
  • the density of the dots 7 increases as the distance between the dots 7 and the auxiliary light-emitting unit 4 increases and/or the area of the dots 7 increases as the distance between the dots 7 and the auxiliary light-emitting unit 4 increases.
  • the dot 7 is arranged such that the farther the dot 7 is away from the auxiliary light-emitting unit 4, the stronger the ability to reflect light, and the farther the light emitted by the auxiliary light-emitting unit 4 is from itself, the weaker, so that the dots 7 of each position reflect.
  • the brightness of the light is even more uniform, so that the brightness of the light emitted from the light guide plate 1 is more uniform.
  • the auxiliary lighting unit 4 is an ultraviolet LED lamp, and the ultraviolet LED lamp can also be connected to the light bar 2 (i.e., the end of the light bar 2 is bent by 90 degrees). Because the ultraviolet light emitted by the ultraviolet LED lamp is invisible light, 2 and 3, the light exit surface 14 and/or the lower surface 15 of the region 5 where the light emitted by the light bar 2 is not covered is provided with the phosphor 6 (the region 5 where the light emitted by the light bar is not covered) The case where the lower surface is provided with the phosphor 6 is not shown in FIG.
  • the phosphor 6 is preferably a mixture of red, green and blue phosphors, or a mixture of blue and yellow phosphors, and the above-mentioned mixed phosphor 6 is
  • the white light is emitted by the excitation of the UV LED, which enhances the brightness of the area.
  • the brightness of the light emitted from the light guide plate 1 can be made more uniform.
  • the light exit surface of the ultraviolet light LED lamp is parallel to the side surface of the light guide plate 1, and in order to better improve the brightness unevenness of the edge portion 11 of the light guide plate, the smaller the light emission angle of the ultraviolet light LED lamp is, the better ( That is, the light emitted from the light is preferably incident only in the edge portion 11 of the light guide plate. For example, in an ideal state, the light emission angle is zero, and the light emitted from the ultraviolet light LED can be totally incident on the edge portion 11 of the light guide plate 1. To maximize the brightness of the area.
  • the advantage of using the ultraviolet light LED lamp is that the ultraviolet light emitted by the light is invisible light, so that the original output brightness distribution of the backlight module is not affected, and the power of the ultraviolet light LED lamp can be adjusted to stimulate the phosphor to emit different brightness.
  • the white light thereby adjusting the brightness of the edge portion of the light guide plate which is not covered by the light emitted by the light bar, enables better and wider realization of the brightness adjustment of the edge portion of the light guide plate.
  • the corresponding arrangement of the above-mentioned halftone dots 7 and the phosphors 6 can make the brightness of the light emitted from the light guide plate 1 more uniform. It should be understood that the above various brightness adjustment methods may be used separately or in combination.
  • an ultraviolet LED lamp is disposed outside the side surface 12 of the light guide plate 1.
  • the ultraviolet light LED lamp directly illuminates the edge portion 11 of the light guide plate adjacent to the light incident surface 13, and can also be in the light bar 2
  • the lower surface 15 of the uncovered area 5 of the emitted light is provided with a dot 7 which reflects more light from the ultraviolet LED lamp, thereby exciting the light exiting surface of the region 5 which is not covered by the emitted light of the light bar.
  • 14 and/or the phosphor 6 of the lower surface 15 emits white light having a relatively uniform brightness, thereby effectively improving the uneven brightness of the area due to the uncovered light of the light bar, so that The brightness of the light emitted from the light guide plate 1 is more uniform.
  • Example 3 Example 3:
  • This embodiment provides a backlight module having a similar structure to the backlight module provided in Embodiment 1, except that the auxiliary light-emitting unit 4 is preferably a white LED lamp. Of course, the auxiliary light-emitting unit 4 can also emit white light. Other light sources.
  • the white LED lamp is provided as the auxiliary light-emitting unit 4, the emitted white light can directly illuminate the dark region 5, thereby improving the brightness of the region 5 of the light bar that is not covered by the light, thereby making the guide
  • the brightness of the light at the edge portion 11 of the light plate is relatively uniform.
  • the auxiliary light-emitting unit 4 is a white LED lamp in this embodiment, the white light emitted by the auxiliary light-emitting unit 4 can directly serve as the light emitted from the backlight module.
  • the phosphor powder 6 can be omitted as compared with the configuration in which the ultraviolet light LED lamp is used as the auxiliary light-emitting unit 4 in the first embodiment.
  • the backlight module of the present invention can be applied to various display devices, including: a liquid crystal display panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigation device, and the like, or any product having a display function or component.
  • the display device including the backlight module of the present invention has a more uniform display screen brightness, and the viewing effect is better.

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

Abstract

一种背光模组和显示装置，背光模组包括导光板（1）和多个点光源（3），导光板（1）包括光入射面（13）、光出射面（14）、与光出射面（14）相对的下表面（15），以及垂直于光出射面（14）和光入射面（13）的两个侧面（12），多个点光源（3）与导光板（1）的光入射面（13）相对设置，背光模组还包括用于向导光板（1）邻近光入射面（13）的边缘部发光的辅助发光单元（4），辅助发光单元（4）设置为与导光板（1）的至少一个侧面（12）相对。背光模组和显示装置可以改善导光板（1）暗区的亮度，使出射光亮度更加均匀一致。

Description

一种背光模组和显示装置 技术领域
本发明属于显示技术领域， 具体涉及一种背光模组和显示装 置。 背景技术
液晶显示器以其优良的品质而获广泛应用， 但由于液晶本身 不发光， 需要背光模组来提供图像显示所需要的亮光。 为保证从 各个角度观看都具有较佳的效果， 液晶显示屏需要满足亮度均一 性的要求， 由此要求背光模组的出射光的亮度必须均匀。
侧入式背光模组已经成为背光模组设计的主流。 然而， 对于 侧入式背光模组， 如图 1 所示， 灯条 2上具有多个 LED ( Light Emitting Diode, 发光二极管）灯 3, 相邻的 LED灯 3之间的间距 为 A, 由于 LED灯 3具有一定的发光角度 α, 这样就导致在导光 板 1 的边缘部产生灯条的发射光未覆盖的区域 5, 即暗区 （hot spot ) ,暗区的亮度较弱，从而导致背光模组的出射光亮度不均匀。 随着 LED 灯的光效和功率的不断提升， 单个导光板所需的 LED 灯数量不断减少， 灯间距 A将不断增大， 使得暗区成为日益严重 的问题。 若不能有效解决暗区的亮度问题， 则不利于导入更大光 效和功率的 LED灯， 进而难以降低产品的成本。
在现有技术中， 采用在导光板的暗区下表面设置网点的方式 改善暗区亮度， 通过这些网点反射的光来补偿暗区的较弱亮度。
现有技术中至少存在如下问题： 在导光板的暗区下表面设置 网点可在一定程度上改善暗区的亮度， 但是暗区本身并没有被 LED灯直接发出的光照亮， 而只有一些反射光到达， 所以这种方 法不能有效改善暗区的亮度。 发明内容
针对现有技术中导光板暗区的亮度不能有效改善从而导致背 光模组的出射光不均勾的问题， 本发明提供一种出射光亮度更加 均匀的背光模组和显示装置。
解决本发明技术问题所采用的技术方案是一种背光模组， 其 包括导光板和多个点光源， 所述导光板包括光入射面、 光出射面、 与光出射面相对的下表面以及垂直于光出射面和光入射面的两个 侧面， 所述多个点光源与所述导光板的光入射面相对设置， 所述 背光模组还包括用于向邻近光入射面的导光板边缘部发光的辅助 发光单元， 所述辅助发光单元设置为与所述导光板的至少一个侧 面相对。
优选的是， 所述多个点光源是 LED灯条。
优选的是， 所述辅助发光单元的光出射面与所述导光板的侧 面平行。
优选的是， 在所述点光源的发射光未覆盖的导光板边缘部的 下表面设有网点。
优选的是， 所述网点密度随着网点与所述辅助发光单元的距 离的增大而增大；
或者
所述网点的面积随着网点与所述辅助发光单元的距离的增大 而增大。
优选的是， 所述辅助发光单元为紫外光 LED灯， 所述点光源 的发射光未覆盖的导光板的边缘部区域的光出射面和 /或下表面设 有荧光粉。
优选的是， 所述荧光粉为红、 绿和蓝荧光粉的混合物， 或为 蓝和黄荧光粉的混合物。
优选的是， 所述荧光粉的密度随着荧光粉与所述辅助发光单 元的距离的增大而增大。
优选的是， 所述辅助发光单元为白光 LED灯。 本发明提供的背光模组， 在导光板的侧面外设有辅助发光单 元， 由于该辅助发光单元直接照亮导光板邻近光入射面的边缘部 区域， 从而改善了灯条的发射光未覆盖的区域（即暗区）的亮度， 因此使得导光板的出射光亮度更为均匀。
本发明还提供一种显示装置， 所述显示装置包括上述背光模 组。
本发明的显示装置由于包括上述背光模组， 由此显示装置的 显示屏的亮度更为均勾， 观看效果更佳。 附图说明
图 1为现有技术中导光板的暗区形成机制的示意图； 图 2为实施例 1中的背光模组的结构示意图；
图 3为沿图 2中背光模组的 B-B方向的剖视图。
附图标记：
1、 导光板； 11、 导光板边缘部； 12、 侧面； 13、 光入射面； 14、 光出射面； 15、 下表面； 2、 灯条； 3、 LED灯； 4、 辅助发光 单元； 5、 暗区； 6、 荧光粉； 7、 网点。 具体实施方式
为使本领域技术人员更好地理解本发明的技术方案， 下面结 合附图和具体实施方式对本发明作进一步详细描述。 实施例 1 :
本实施例提供一种背光模组。 图 2为本实施例中的背光模组 的结构示意图。如图 2所示，本实施例中的背光模组包括导光板 1、 多个点光源 3和辅助发光单元 4。
导光板 1 包括光入射面 13、 邻近光入射面 13的导光板边缘 部分 11、 光出射面 14、 与光出射面 14相对的下表面 15以及与光 入射面 13邻接并且夹在光出射面 14与下表面 15 间的两个侧面 12。 多个点光源设置为与导光板 1的光入射面 13相对。多个点光 源优选为灯条 2, 更优选为白光 LED灯条（也可用其他能够发出 白光的光源代替白光 LED灯条） ， 灯条 2 包括若干个白光 LED 灯 3 (每个白光 LED灯 3相当于一个点光源） 。 本实施例仅以白 光 LED灯为例进行说明； 点光源的种类不限于白光 LED灯， 还 可以为蓝光 LED灯或者其他类型的点光源。
其中，背光模组还包括用于向邻近光入射面 13的导光板边缘 部分 11发光的辅助发光单元 4, 辅助发光单元 4设置为与导光板 1的至少一个侧面相对。
具体地，辅助发光单元 4可以设置为与垂直于光入射面 13和 光出射面 14的侧面 12相对， 如图 2所示。 或者， 辅助发光单元 4 也可以设置为与光出射面 14或下表面 15相对， 此时， 优选设置 导光条以使辅助发光单元 4的出光方向对应于导光板上的暗区部 分。可以提供多个辅助发光单元 4, 并根据背光模组的具体应用条 件设置在包括但不限于上述位置的适当位置处。
优选的， 在本实施例中， 如图 2和图 3所示， 在灯条的发射 光未覆盖的区域 5 (即暗区） 的下表面 15设有网点 7。 通过设置 网点 7,可使暗区 5被更多的反射光照射，从而提高该区域的亮度。
进一步优选的， 网点 7的密度随着网点 7与辅助发光单元 4 的距离的增大而增大和 /或网点 7的面积随着网点 7与辅助发光单 元 4的距离的增大而增大。 这样设置网点 7可使网点 7离辅助发 光单元 4越远其反射光的能力就越强， 而辅助发光单元 4发出的 光的强度离其本身越远则越弱， 这样各个位置的网点 7反射的光 线的亮度就更为均勾， 从而使得导光板 1 的出射光的亮度更为均 匀。 实施例 2
在进一步优选的实施例 2中， 辅助发光单元 4为紫外光 LED 灯， 该紫外光 LED灯也可连接在上述灯条 2上（即把灯条 2端部 弯折 90度） 。 由于紫外光 LED灯发出的紫外光为不可见光， 因 此， 如图 2和图 3所示， 在灯条 2的发射光未覆盖的区域 5的光 出射面 14和 /或下表面 15设有荧光粉 6 (灯条的发射光未覆盖的 区域 5的下表面设置荧光粉 6的情形在图 3中未示出）， 荧光粉 6 优选为红、 绿和蓝荧光粉的混合物， 或为蓝和黄荧光粉的混合物， 上述混合的荧光粉 6在紫外光 LED 灯光线的激发下都能发出白 光， 从而增强了该区域的亮度。
通过使所涂布的荧光粉 6的密度随着荧光粉 6与紫外光 LED 灯的距离的增大而增大， 能够使导光板 1 的出射光的亮度更为均 匀。
再优选的是， 紫外光 LED灯的光出射面平行于导光板 1的侧 面， 而且为了较好的改善导光板边缘部 11亮度不均匀的问题， 紫 外光 LED灯的发光角越小越好（也就是其射出的光优选只射入导 光板的边缘部区域 11中） ， 比如理想状态下发光角度为零， 此时 紫外光 LED灯的发射光可全部射入导光板 1的边缘部区域 11 ,从 而最大程度地增强该区域的亮度。
采用紫外光 LED灯的优点在于，其发出的紫外光是不可见光， 于是不会影响背光模组原有的输出亮度分布， 而且还可以通过调 整紫外光 LED灯的功率以激发荧光粉发出不同亮度的白光， 从而 调节灯条的发射光未覆盖的导光板边缘部的亮度， 能够更好和更 广泛地实现对导光板边缘部的亮度调节。
上述网点 7和荧光粉 6的对应设置均可以使得导光板 1的出 射光的亮度更为均匀。 应当理解， 以上的多种调整亮度方式可以 分别单独使用， 也可结合使用。
本实施例提供的背光模组，在导光板 1的侧面 12外设有紫外 光 LED灯， 由紫外光 LED灯直接照射邻近光入射面 13的导光板 边缘部 11 , 同时还可以在灯条 2的发射光未覆盖的区域 5的下表 面 15上设置离紫外光 LED灯越远越能反射更多光线的网点 7,从 而激发涂布在灯条的发射光未覆盖的区域 5的光出射面 14和 /或下 表面 15的荧光粉 6发出亮度较为均勾的白光， 进而有效地改善了 该区域由于灯条的发射光未覆盖而导致亮度不均勾的情况， 使得 导光板 1的出射光的亮度更为均勾一致。 实施例 3:
本实施例提供一种背光模组， 其与实施例 1提供的背光模组 具有类似的结构， 区别在于，辅助发光单元 4优选为白光 LED灯， 当然， 辅助发光单元 4也可为发出白光的其他光源。
在本实施例中，由于提供了白光 LED灯作为辅助发光单元 4, 使得所发出的白光能够直接照亮暗区 5,从而改善了灯条的发射光 未覆盖的区域 5的亮度， 进而使得导光板边缘部 11的光线亮度较 为均匀。 当然， 由于本实施例中辅助发光单元 4为白光 LED灯， 其发出的白光能直接作为背光模组的出射光。 与实施例 1 中使用 紫外光 LED灯作为辅助发光单元 4的构造相比， 能够不用设置荧 光粉 6。
本发明的背光模组可以应用于各种显示装置中， 包括： 液晶 显示面板、 电子纸、 手机、 平板电脑、 电视机、 显示器、 笔记本 电脑、 数码相框、 导航仪等任何具有显示功能的产品或部件。
包括本发明的背光模组的显示装置具有更为均勾的显示屏亮 度， 观看效果更佳。
可以理解的是， 以上实施方式仅仅是为了说明本发明的原理 而采用的示例性实施方式， 然而本发明并不局限于此。 对于本领 域内的普通技术人员而言， 在不脱离本发明的精神和实质的情况 下， 可以做出各种变型和改进， 这些变型和改进也视为本发明的 保护范围。

Claims

权 利 要 求 书 UP-131907-02
1. 一种背光模组， 包括导光板和多个点光源， 所述导光板包 括光入射面、 光出射面、 与光出射面相对的下表面， 以及垂直于 光出射面和光入射面的两个侧面， 所述多个点光源与所述导光板 的光入射面相对设置， 其中，
所述背光模组还包括用于向邻近光入射面的导光板边缘部发 光的辅助发光单元， 所述辅助发光单元设置为与所述导光板的至 少一个侧面相对。
2. 根据权利要求 1所述的背光模组， 其中， 所述多个点光源 是 LED灯条。
3. 根据权利要求 1所述的背光模组， 其中， 所述辅助发光单 元的光出射面平行于所述导光板的侧面。
4. 根据权利要求 3所述的背光模组， 其中， 所述辅助发光单 元的发射光线垂直于所述辅助发光单元的发光表面。
5. 根据权利要求 1所述的背光模组， 其中， 在所述点光源的 发射光未覆盖的导光板边缘部的下表面设有网点。
6. 根据权利要求 5所述的背光模组， 其中，
所述网点密度随着网点与所述辅助发光单元的距离的增大而 增大。
7. 根据权利要求 5所述的背光模组， 其中， 所述网点的面积 随着网点与所述辅助发光单元的距离的增大而增大。
8. 根据权利要求 1至 7任意一项所述的背光模组， 其中， 所述辅助发光单元为紫外光 LED灯；
所述点光源的发射光未覆盖的导光板的边缘部区域的光出射 面和下表面中的至少一个上设置荧光粉。
9. 根据权利要求 8所述的背光模组，其中，所述荧光粉为红、 绿和蓝荧光粉的混合物， 或为蓝和黄荧光粉的混合物。
10. 根据权利要求 8所述的背光模组， 其中，
所述荧光粉的密度随着荧光粉与所述辅助发光单元的距离的 增大而增大。
11. 根据权利要求 8所述的背光模组， 其中，
通过调整紫外光 LED灯的功率以激发荧光粉发出不同亮度的 白光。
12. 根据权利要求 1至 7任意一项所述的背光模组， 其中， 所述辅助发光单元为白光 LED灯。
13. 一种显示装置， 其中， 所述显示装置包括权利要求 1 至 12任意一项所述的背光模组。
PCT/CN2013/085141 2013-06-20 2013-10-12 一种背光模组和显示装置 WO2014201785A1 (zh)

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