WO2017096863A1 - 一种背光模组、显示模组及显示设备 - Google Patents

一种背光模组、显示模组及显示设备 Download PDF

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Publication number
WO2017096863A1
WO2017096863A1 PCT/CN2016/088971 CN2016088971W WO2017096863A1 WO 2017096863 A1 WO2017096863 A1 WO 2017096863A1 CN 2016088971 W CN2016088971 W CN 2016088971W WO 2017096863 A1 WO2017096863 A1 WO 2017096863A1
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Prior art keywords
light
dimming
guide plate
backlight module
phosphor
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PCT/CN2016/088971
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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 US15/240,424 priority Critical patent/US20170168210A1/en
Publication of WO2017096863A1 publication Critical patent/WO2017096863A1/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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the 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
    • G02B6/0066—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
    • G02B6/0066—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

  • Embodiments of the present invention relate to the field of display technologies, and in particular, to a backlight module, a display module, and a display device.
  • a backlight module of a liquid crystal display device generally uses a light-emitting diode (LED) as a light source.
  • the backlight module can be divided into two types: a straight down light type and a side light input type.
  • the light source of the direct-lighting backlight module is distributed at the bottom of the light guide plate.
  • the backlight module is mainly applied to a large-size liquid crystal display device such as a display and a television; the light source of the side-into-light backlight module is distributed on the light guide plate.
  • this type of backlight module is mainly used in small-sized display devices such as notebooks, tablet computers, and mobile phones.
  • the side-in-light backlight module has also begun to be applied to larger-sized display devices. In order to bring users a better visual experience.
  • the entire screen is illuminated or the whole is darkened, and local Dimming cannot be realized, so that the screen contrast of the display device cannot be optimized, which affects the display effect of the screen;
  • the light source is still in a brighter state, resulting in higher power consumption.
  • the invention provides a backlight module, a display module and a display device for realizing regional dimming of the backlight module, thereby improving the picture quality of the display device and reducing the power consumption thereof.
  • the backlight module provided by the invention comprises a light guide plate, a first LED lamp group and a second LED lamp group, wherein:
  • the light guide plate has three rows and a plurality of rows of dimming regions, and the light emitting surface of the first row of dimming regions is provided with a first coating layer containing an ultraviolet light absorber and a yellow phosphor; and a light emitting surface of the second row of dimming regions is disposed.
  • a package a second coating comprising a blue light absorber and a white phosphor;
  • the first LED lamp group is disposed on a side of the light guide plate adjacent to the first row of dimming regions, and includes a blue LED lamp string corresponding to the column dimming region and independent of the control circuit;
  • the second LED lamp group is disposed on a side of the light guide plate adjacent to the third row of dimming regions, and includes a white LED string and an ultraviolet LED string that are disposed corresponding to the column dimming region and are independent of the control circuit.
  • the white LED of the white LED string and the ultraviolet LED of the ultraviolet LED string are alternately arranged.
  • the first coating layer comprises a two-layer structure, which is an ultraviolet light absorber layer and a yellow phosphor layer, respectively, the ultraviolet light absorber layer being close to a light-emitting surface of the first row of light-modulating regions of the light guide plate; or
  • the first coating layer is a single layer structure comprising an ultraviolet light absorber and a yellow phosphor.
  • the second coating layer comprises a two-layer structure, which is a blue light absorber layer and a white phosphor layer, respectively, the blue light absorber layer being close to a light-emitting surface of the second row of light-modulating regions of the light guide plate; or
  • the second coating is a single layer structure comprising a blue light absorber and a white phosphor.
  • the light guide plate has three rows and three columns of dimming regions.
  • the yellow phosphor comprises an equal amount of mixed red phosphor and green phosphor; the white phosphor comprises an equal amount of mixed red phosphor, green phosphor and blue phosphor.
  • the blue light emitted by the blue LED lamp string of the first LED lamp group can excite the yellow phosphor of the dimming region of the corresponding row of the first row to generate white light after entering the light guide plate, and corresponding rows in the second row.
  • the dimming zone is absorbed by the blue light absorber, so that the dimming zone of the corresponding row of the third row cannot be entered; the white light emitted by the white LED lamp string of the second LED lamp set can enter the third row corresponding column after entering the light guide plate.
  • the light-emitting surface of the dimming zone is transmitted; the ultraviolet light emitted by the ultraviolet LED string of the second LED lamp group, after entering the light guide plate, can excite the white phosphor of the dimming zone of the corresponding row of the second row to generate white light, and The dimming zone in the corresponding row of the first row is absorbed by the ultraviolet light absorber.
  • the light emitted from each dimming zone of the light guide plate is white light
  • the control circuits of the respective blue LED string, the white LED string and the ultraviolet LED string are independent, it is possible to control each The voltage of the string controls its light and dark state, thereby realizing the area dimming of the backlight module, thereby improving the picture quality of the display device and reducing its power consumption.
  • the present invention also provides a display module, including the backlight module of any of the foregoing technical solutions.
  • the backlight module of the display module can realize regional dimming, thereby improving the picture quality of the display device and reducing the power consumption thereof.
  • the present invention also provides a display device comprising the display module described in the foregoing technical solution.
  • the display device has better picture quality and lower power consumption.
  • FIG. 1 is a top plan view of a light guide plate and a light group in a backlight module according to an embodiment of the present invention
  • Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;
  • a backlight module provided by an embodiment of the present invention includes a light guide plate 1, a first LED light group 2, and a second LED light group 3, wherein:
  • the light guide plate 1 has three rows and a plurality of rows of dimming regions, and the light emitting surface of the first row of dimming regions is provided with a first coating layer 11 containing an ultraviolet light absorber and a yellow phosphor; and a light emitting surface of the second row of dimming regions is disposed.
  • a second coating 12 comprising a blue light absorber and a white phosphor;
  • the first LED lamp group 2 is disposed on a side of the light guide plate 1 adjacent to the first row of dimming regions, and includes a blue LED lamp string 21 corresponding to the column dimming region and independent of the control circuit;
  • the second LED lamp group 3 is disposed on a side of the light guide plate 1 adjacent to the third row of dimming regions, and includes a white LED string 31 and an ultraviolet LED string 32 that are disposed corresponding to the column dimming region and are independent of the control circuit.
  • the structure of the backlight module includes, in addition to the above-mentioned light guide plate, the first LED lamp group and the second LED lamp group, a back plate, a reflective sheet, an optical film, a plastic frame, and the like, wherein the back plate has an accommodation.
  • the space, the reflection sheet, the light guide plate and the optical film are sequentially placed in the accommodating space of the light guide plate, and the first LED lamp group and the second LED lamp group are respectively located at the opposite light-incident end faces of the light guide plate and the back plate.
  • the plastic frame is positioned above the optical film and connected to the back plate.
  • the backlight module of the embodiment of the invention can realize regional dimming, and the light guide plate has three rows and a plurality of rows of dimming zones.
  • the specific number of columns of the dimming zone is not limited, for example, it may be two columns, three columns, four columns, etc. When the size of the display device is large, the number of columns of the dimming zone may be designed more.
  • the blue LED light string 21 is correspondingly arranged with the column dimming area, the number of the blue LED light strings 21 is the same as the number of columns of the dimming area; since the white LED string 31 and the ultraviolet LED string 32 are respectively dimmed with the column The area is correspondingly set, and therefore, the number of the white LED string 31 and the ultraviolet LED string 32 is the same as the number of columns of the dimming area.
  • the light guide plate 1 has nine dimming areas of three rows and three columns, the number of blue LED light strings 21 is three, and the number of white LED string 31 and ultraviolet LED string 32 are respectively The three, ie the second LED light set 3 comprises six LED light strings.
  • the light zone is absorbed by the blue light absorber, so that it cannot enter the dimming zone of the corresponding row of the third row;
  • the white light emitted by the white LED lamp string 31 of the second LED lamp group 3 can be transmitted from the light exit surface of the dimming region of the corresponding row of the third row;
  • the ultraviolet light emitted by the ultraviolet LED string 32 of the second LED lamp group 3 can excite the white phosphor of the dimming region of the corresponding row of the second row to generate white light, and corresponding rows in the first row
  • the dimming zone is absorbed by the ultraviolet light absorber.
  • the light emitted from each dimming zone of the light guide plate 1 is white light
  • the control circuits of the respective blue LED string 21, the white LED string 31 and the ultraviolet LED string 32 are independent, therefore,
  • the brightness of the light string can be controlled by controlling the voltage of each light string, thereby realizing the area dimming of the backlight module, thereby improving the picture quality of the display device and reducing its power consumption.
  • the portion corresponding to the dimming area of the first row of the third row displays a darker picture
  • the corresponding portion of the other dimming areas displays a brighter picture
  • the control of two LED groups in the backlight module is controlled.
  • the method may be: three blue LED light strings 21 of the first LED light group 2 are in a bright state
  • the second LED light group 3 corresponds to the white LED light string 31 of the second column dimming area and the third column dimming area.
  • the ultraviolet LED string 32 is in a bright state
  • the second LED group 3 corresponds to the ultraviolet light LED string 32 of the first column dimming region is in a bright state
  • the second LED group 3 corresponds to the first column dimming region.
  • the white LED string 31 is in a dark state.
  • the white LEDs of the white LED string 31 and the ultraviolet LEDs of the ultraviolet LED string 32 are alternately arranged. This design makes the brightness uniformity in each dimming zone better.
  • the first coating layer 11 comprises a two-layer structure, which is an ultraviolet light absorber layer 11a and a yellow phosphor layer 11b, respectively, and the ultraviolet light absorber 11a layer is adjacent to the light guide plate 1.
  • the second coating layer 12 comprises a two-layer structure, respectively a blue light absorber layer 12a and a white phosphor layer 12b, and the blue light absorber layer 12a is adjacent to the second row of light-guiding regions of the light guide plate 1.
  • Glossy is a two-layer structure, which is an ultraviolet light absorber layer 11a and a yellow phosphor layer 11b, respectively, and the ultraviolet light absorber 11a layer is adjacent to the light guide plate 1.
  • the blue light absorber layer 12a in the second coating layer 12 is close to the light exit surface of the light guide plate 1, and can sufficiently absorb the incident blue light, thereby preventing blue light from entering the third line dimming area. Therefore, the third line dimming area can be Produce a more pure white light.
  • the ultraviolet light absorber layer 11a in the first coating layer 11 is close to the light exit surface of the light guide plate 1, and can sufficiently absorb the incident ultraviolet light, thereby reducing the influence of ultraviolet light on the yellow phosphor layer, and therefore, the first line The dimming zone can emit more pure white light.
  • the first coating layer may also be a single layer structure including an ultraviolet light absorber and a yellow phosphor
  • the second layer may also be a single layer including a blue light absorber and a white phosphor. structure.
  • the red phosphor and the green phosphor are mixed in an equal amount to appear yellow, and the red phosphor, the green phosphor and the blue phosphor are mixed in an equal amount to present a white color. Therefore, in still another embodiment of the present invention, the yellow phosphor is yellow. It is also possible to include an equal amount of mixed red phosphor and green phosphor; the white phosphor may also include an equal amount of mixed red phosphor, green phosphor and blue phosphor.
  • the embodiment of the invention further provides a display module, which comprises the backlight module of any of the foregoing technical solutions.
  • the backlight module of the display module can realize regional dimming, thereby improving the picture quality of the display device and reducing the power consumption thereof.
  • the embodiment of the invention further provides a display device, which comprises the display module of the foregoing technical solution.
  • the specific type of the display device is not limited, and may be, for example, a liquid crystal television, a liquid crystal display, or a mobile phone display.
  • the brightness of the dimming area of the backlight module corresponding to the brighter part of the screen is higher, and the brightness of the dimming area of the backlight module corresponding to the darker part of the screen is lower, and the contrast of the entire display screen is higher. High, picture quality is better, and power consumption is lower.

Abstract

一种背光模组、显示模组及显示设备。背光模组包括导光板（1）、第一LED灯组（2）和第二LED灯组（3），其中：导光板（1）具有三行若干列个调光区，第一行调光区的出光面设置有包含紫外光吸收剂层（11a）和黄色荧光粉层（11b）的第一涂层（11）；第二行调光区的出光面设置有包括蓝光吸收剂层（12a）和白色荧光粉层（12b）的第二涂层（12）；第一LED灯组（2）设置于导光板（1）靠近第一行调光区的一侧，包括与列调光区对应设置且控制电路独立的蓝光LED灯串（21）；第二LED灯组（3）设置于导光板（1）靠近第三行调光区的一侧，包括与列调光区对应设置且控制电路独立的白光LED灯串（31）和紫外光LED灯串（32）。采用上述技术方案可以实现背光模组的区域调光，从而改善显示设备的画面品质并降低其功耗。

Description

一种背光模组、显示模组及显示设备
本申请要求在2015年12月10日提交中国专利局、申请号为201521036231.4、实用新型名称为“一种背光模组、显示模组及显示设备”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
本发明实施例涉及显示技术领域，特别是涉及一种背光模组、显示模组及显示设备。
背景技术
目前，液晶显示设备的背光模组普遍采用LED(light-emitting diode，发光二极管，简称LED)作为光源。根据光源的分布位置，背光模组可分为直下入光式和侧入光式两种。其中，直下入光式背光模组的光源分布于导光板的底部，该类背光模组主要应用于显示器、电视等大尺寸液晶显示设备；侧入光式背光模组的光源分布于导光板的侧边，该类背光模组主要应用于笔记本、平板电脑以及手机等小尺寸显示设备，随着LED相关技术的不断进步，侧入光式背光模组同样也开始应用于较大尺寸的显示设备，以为用户带来更好的视觉感受。
传统的侧入光式背光模组，整个画面整体点亮或者整体变暗，无法实现分区域调光(Local Dimming)，从而无法使显示设备的画面对比度达到最佳，影响到画面显示效果；另一方面，当显示设备画面的某个区域显示为黑时，光源仍然处于较亮的状态，导致功耗较高。
发明内容
本发明提供了一种背光模组、显示模组及显示设备，以实现背光模组的区域调光，从而改善显示设备的画面品质并降低其功耗。
本发明提供的背光模组，包括导光板、第一LED灯组和第二LED灯组，其中：
所述导光板具有三行若干列个调光区，第一行调光区的出光面设置有包含紫外光吸收剂和黄色荧光粉的第一涂层；第二行调光区的出光面设置有包 括蓝光吸收剂和白色荧光粉的第二涂层；
所述第一LED灯组设置于导光板靠近第一行调光区的一侧，包括与列调光区对应设置且控制电路独立的蓝光LED灯串；
所述第二LED灯组设置于导光板靠近第三行调光区的一侧，包括与列调光区对应设置且控制电路独立的白光LED灯串和紫外光LED灯串。
优选的，所述白光LED灯串的白光LED和紫外光LED灯串的紫外光LED交替排布。
可选的，所述第一涂层包括两层结构，分别为紫外光吸收剂层和黄色荧光粉层，所述紫外光吸收剂层靠近导光板的第一行调光区的出光面；或者
所述第一涂层为包含紫外光吸收剂和黄色荧光粉的单层结构。
可选的，所述第二涂层包括两层结构，分别为蓝光吸收剂层和白色荧光粉层，所述蓝光吸收剂层靠近导光板的第二行调光区的出光面；或者
所述第二涂层为包含蓝光吸收剂和白色荧光粉的单层结构。
具体的，所述导光板具有三行三列个调光区。
可选的，所述黄色荧光粉包括等量混合的红色荧光粉和绿色荧光粉；所述白色荧光粉包括等量混合的红色荧光粉、绿色荧光粉和蓝色荧光粉。
在本发明技术方案中，第一LED灯组的蓝光LED灯串射出的蓝光在进入导光板后可激发第一行对应列的调光区的黄色荧光粉产生白光，并在第二行对应列的调光区被蓝光吸收剂吸收掉，从而无法进入第三行对应列的调光区；第二LED灯组的白光LED灯串射出的白光在进入导光板后，可以从第三行对应列的调光区的出光面透射出；第二LED灯组的紫外光LED灯串射出的紫外光在进入导光板后，可激发第二行对应列的调光区的白色荧光粉产生白光，并在第一行对应列的调光区被紫外光吸收剂吸收掉。可见，采用该结构设计，从导光板各调光区射出的光均为白光，并且由于各个蓝光LED灯串、白光LED灯串和紫外光LED灯串的控制电路独立，因此，可以通过控制各个灯串的电压控制其明暗状态，从而实现背光模组的区域调光，进而改善显示设备的画面品质并降低其功耗。
本发明还提供了一种显示模组，包括前述任一技术方案所述的背光模组。该显示模组的背光模组可以实现区域调光，从而可以改善显示设备的画面品质并降低其功耗。
本发明还提供了一种显示设备，包括前述技术方案所述的显示模组。该 显示设备的画面品质较佳，并且功耗较低。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例背光模组中导光板和灯组俯视图；
图2为图1的A-A向截面视图。
附图标记：
1-导光板
2-第一LED灯组
3-第二LED灯组
11-第一涂层
11a-紫外光吸收剂层
11b-黄色荧光粉层
12-第二涂层
12a-蓝光吸收剂层
12b-白色荧光粉层
21-蓝光LED灯串
31-白光LED灯串
32-紫外光LED灯串
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1和图2所示，本发明实施例提供的背光模组，包括导光板1、第一LED灯组2和第二LED灯组3，其中：
导光板1具有三行若干列个调光区，第一行调光区的出光面设置有包含紫外光吸收剂和黄色荧光粉的第一涂层11；第二行调光区的出光面设置有包括蓝光吸收剂和白色荧光粉的第二涂层12；
第一LED灯组2设置于导光板1的靠近第一行调光区的一侧，包括与列调光区对应设置且控制电路独立的蓝光LED灯串21；
第二LED灯组3设置于导光板1的靠近第三行调光区的一侧，包括与列调光区对应设置且控制电路独立的白光LED灯串31和紫外光LED灯串32。
背光模组的结构，除包括上述的导光板、第一LED灯组和第二LED灯组外，通常还包括背板、反射片、光学膜片和胶框等，其中，背板具有容置空间，反射片、导光板和光学膜片顺序放置在导光板的容置空间内，第一LED灯组和第二LED灯组分别位于导光板的两个相对的入光侧端面与背板的侧壁之间，胶框位于光学膜片的上方并且与背板连接。
本发明实施例的背光模组可以实现区域调光，导光板具有三行若干列个调光区。调光区的具体列数不限，例如可以为两列、三列、四列等等，当显示设备的尺寸较大时，调光区的列数可以设计的较多。
由于蓝光LED灯串21与列调光区对应设置，因此，蓝光LED灯串21的数量与调光区的列数相同；由于白光LED灯串31和紫外光LED灯串32分别与列调光区对应设置，因此，白光LED灯串31和紫外光LED灯串32的数量均与调光区的列数相同。
图1所示实施例中，导光板1具有三行三列共九个调光区，蓝光LED灯串21的数量为三个，白光LED灯串31和紫外光LED灯串32的数量分别为三个，即第二LED灯组3包括六个LED灯串。
请参照图1所示，该实施例背光模组实现区域调光的具体原理如下：
第一LED灯组2的任一蓝光LED灯串21射出的蓝光在进入导光板1后可激发第一行对应列的调光区的黄色荧光粉产生白光，并在第二行对应列的调光区被蓝光吸收剂吸收掉，从而无法进入第三行对应列的调光区；
第二LED灯组3的白光LED灯串31射出的白光在进入导光板1后，可以从第三行对应列的调光区的出光面透射出；
第二LED灯组3的紫外光LED灯串32射出的紫外光在进入导光板1后，可激发第二行对应列的调光区的白色荧光粉产生白光，并在第一行对应列的调光区被紫外光吸收剂吸收掉。
可见，采用该结构设计，从导光板1各调光区射出的光均为白光，并且由于各个蓝光LED灯串21、白光LED灯串31和紫外光LED灯串32的控制电路独立，因此，可以通过控制各个灯串的电压控制其明暗状态，从而实现背光模组的区域调光，进而改善显示设备的画面品质并降低其功耗。
例如，显示设备的显示画面中，第三行第一列调光区对应的部分显示较暗画面，其余调光区对应的部分显示较亮画面，则背光模组中两个LED灯组的控制方式可以为：第一LED灯组2的三个蓝光LED灯串21处于较亮状态，第二LED灯组3对应第二列调光区和第三列调光区的白光LED灯串31和紫外光LED灯串32处于较亮状态，第二LED灯组3对应第一列调光区的紫外光LED灯串32处于较亮状态，第二LED灯组3对应第一列调光区的白光LED灯串31处于较暗状态。
如图1所示，在该优选实施例中，白光LED灯串31的白光LED和紫外光LED灯串32的紫外光LED交替排布。该设计可以使各个调光区内的亮度均一性较好。
如图2所示，在该优选实施例中，第一涂层11包括两层结构，分别为紫外光吸收剂层11a和黄色荧光粉层11b，紫外光吸收剂11a层靠近导光板1的第一行调光区的出光面；第二涂层12包括两层结构，分别为蓝光吸收剂层12a和白色荧光粉层12b，蓝光吸收剂层12a靠近导光板1的第二行调光区的出光面。
第二涂层12中的蓝光吸收剂层12a靠近导光板1的出光面，可以将射入的蓝光充分吸收，从而防止蓝光射入第三行调光区，因此，第三行调光区可以发出较为纯正的白光。第一涂层11中的紫外光吸收剂层11a靠近导光板1的出光面，可以将射入的紫外光充分吸收，从而减小紫外光对黄色荧光粉层的照射影响，因此，第一行调光区可以发出较为纯正的白光。
此外，在本发明的其它实施例中，第一涂层也可以为包含紫外光吸收剂和黄色荧光粉的单层结构，第二涂层也可以为包含蓝光吸收剂和白色荧光粉的单层结构。
根据色光三原色，红色荧光粉和绿色荧光粉等量混合呈现黄色，红色荧光粉、绿色荧光粉和蓝色荧光粉等量混合呈现白色，因此，在本发明的又一实施例中，黄色荧光粉也可以包括等量混合的红色荧光粉和绿色荧光粉；白色荧光粉也可以包括等量混合的红色荧光粉、绿色荧光粉和蓝色荧光粉。
本发明实施例还提供了一种显示模组，包括前述任一技术方案的背光模组。该显示模组的背光模组可以实现区域调光，从而可以改善显示设备的画面品质并降低其功耗。
本发明实施例还提供了一种显示设备，包括前述技术方案的显示模组。显示设备的具体类型不限，例如可以为液晶电视机、液晶显示器或者手机显示屏等等。
显示设备在进行画面显示时，画面较亮的部分对应的背光模组的调光区亮度较高，画面较暗的部分对应的背光模组的调光区亮度较低，整个显示画面的对比度较高，画面品质较佳，并且功耗较低。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (8)

  1. 一种背光模组，其特征在于，包括导光板、第一LED灯组和第二LED灯组，其中：
    所述导光板具有三行若干列个调光区，第一行调光区的出光面设置有包含紫外光吸收剂和黄色荧光粉的第一涂层；第二行调光区的出光面设置有包括蓝光吸收剂和白色荧光粉的第二涂层；
    所述第一LED灯组设置于导光板靠近第一行调光区的一侧，包括与列调光区对应设置且控制电路独立的蓝光LED灯串；
    所述第二LED灯组设置于导光板靠近第三行调光区的一侧，包括与列调光区对应设置且控制电路独立的白光LED灯串和紫外光LED灯串。
  2. 根据权利要求1所述的背光模组，其特征在于，所述白光LED灯串的白光LED和紫外光LED灯串的紫外光LED交替排布。
  3. 根据权利要求1所述的背光模组，其特征在于，所述第一涂层包括两层结构，分别为紫外光吸收剂层和黄色荧光粉层，所述紫外光吸收剂层靠近导光板的第一行调光区的出光面；或者
    所述第一涂层为包含紫外光吸收剂和黄色荧光粉的单层结构。
  4. 根据权利要求1所述的背光模组，其特征在于，所述第二涂层包括两层结构，分别为蓝光吸收剂层和白色荧光粉层，所述蓝光吸收剂层靠近导光板的第二行调光区的出光面；或者
    所述第二涂层为包含蓝光吸收剂和白色荧光粉的单层结构。
  5. 根据权利要求1所述的背光模组，其特征在于，所述导光板具有三行三列个调光区。
  6. 根据权利要求1～5任一项所述的背光模组，其特征在于，所述黄色荧光粉包括等量混合的红色荧光粉和绿色荧光粉；所述白色荧光粉包括等量混合的红色荧光粉、绿色荧光粉和蓝色荧光粉。
  7. 一种显示模组，其特征在于，包括权利要求1～6任一项所述的背光模组。
  8. 一种显示设备，其特征在于，包括权利要求7所述的显示模组。
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