WO2017096864A1 - 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
WO2017096864A1
WO2017096864A1 PCT/CN2016/088992 CN2016088992W WO2017096864A1 WO 2017096864 A1 WO2017096864 A1 WO 2017096864A1 CN 2016088992 W CN2016088992 W CN 2016088992W WO 2017096864 A1 WO2017096864 A1 WO 2017096864A1
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Prior art keywords
light
backlight module
back plate
light absorbing
display
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Ceased
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PCT/CN2016/088992
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English (en)
French (fr)
Inventor
付常佳
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Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Priority to US15/244,768 priority Critical patent/US20170168218A1/en
Publication of WO2017096864A1 publication Critical patent/WO2017096864A1/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
    • G02B6/0013—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
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02B6/0055—Reflecting element, sheet or layer

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 an LED (light-emitting diode, LED for short) as a light source.
  • the backlight module can be divided into a direct type and a side type.
  • the LED light bar is located at the side end of the light guide plate.
  • the backlight module is mainly applied to small-sized display devices such as notebooks, palmtop computers, and mobile phones. With the continuous advancement of LED related technologies, the side-entry type The backlight module has also been applied to larger-sized display devices to provide users with a better visual experience.
  • the structure of the side-lit backlight module mainly includes: a backboard having an accommodating space; a reflective sheet, a light guide plate and an optical film sequentially disposed in the accommodating space of the backboard; and is located in the accommodating space of the backboard and located An LED lamp group on the light entrance side of the light guide plate; and a plastic frame above the optical film and connected to the back plate.
  • the structure of the back plate 10, the light guide plate 11 and the LED lamp group 12 is as shown in FIG. 1 .
  • the light in the area where each LED is directly opposite is relatively strong, so that a brighter brightness is formed in the area where the LED is directly opposite.
  • A1 the area where the gap between the adjacent two LEDs faces directly forms a dark band A2 with a relatively small brightness, and the phenomenon of light and dark phase formed by this is called a lamp shadow.
  • the presence of the light shadow makes the display quality of the display device poor.
  • the invention provides a backlight module, a display module and a display device, so as to improve the lamp shadow phenomenon of the backlight module, thereby improving the picture quality of the display device.
  • the invention provides a backlight module, comprising: a backboard having an accommodating space; a reflective sheet, a light guide plate, and an optical film in the accommodating space of the back plate; an LED lamp group located in the accommodating space of the back plate and located on the light incident side of the light guide plate, each LED lamp group including a plurality of LEDs; a plastic frame located above the optical film and connected to the back plate; the backlight module further includes:
  • the light absorbing layer structure is opposite to an orthographic projection position of the LED on the backplane bottom plate, the reflective layer structure and adjacent LEDs The gap between them is opposite to the orthographic projection position on the backplane floor.
  • the backlight module provided by the invention can absorb part of the light at the bright band of the lamp shadow region, and the reflective layer structure can reflect part of the light emitted from the light guide plate and the optical film back to the dark band of the lamp shadow region, thereby making the backlight
  • the light on the light side of the module tends to be uniform, which effectively improves the light shadow phenomenon of the backlight module, thereby improving the picture quality of the display device.
  • the light absorbing layer structure is a light absorbing tape
  • the light reflecting layer structure is a reflective tape.
  • the plurality of light absorbing layer structures and the plurality of light reflecting layer structures are a unitary structure.
  • the light absorbing layer structure is a light absorbing film layer disposed inside the front wall of the plastic frame
  • the light reflecting layer structure is a reflective film layer disposed inside the front wall of the plastic frame.
  • the display module provided by the present invention includes the backlight module according to any one of the above technical solutions.
  • the backlight module of the display module has relatively uniform light on the light incident side and high picture quality, so the display mode of the display module is better.
  • the present invention provides a display device comprising the display module according to the above technical solution.
  • the display device has a high picture quality and a good display effect.
  • the display device comprises a liquid crystal television, a liquid crystal display or a mobile phone display.
  • FIG. 1 is a schematic structural view of a prior art backlight module
  • FIG. 2 is a top plan view of a backlight module according to an embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional view of a display module according to an embodiment of the present invention.
  • the backlight module provided by the embodiment of the present invention includes: a backing plate 10 having an accommodating space; a reflective sheet 18 and a light guiding plate 11 sequentially disposed in the accommodating space of the backing plate 10; An optical film 15; an LED lamp group 12 located in the accommodating space of the back plate 10 and located on the light-incident side of the light guide plate 11, each LED lamp group 12 includes a plurality of LEDs 122; above the optical film 15 and the back plate 10
  • the connected plastic frame 14; the backlight module further includes:
  • the orthographic projection of the light absorbing layer structure on the backplane substrate is opposite to the orthographic projection position of the LED on the backplane substrate
  • the orthographic projection of the retroreflective layer structure on the backplane substrate is opposite to the orthographic projection position of the gap between adjacent LEDs on the backplane substrate.
  • the LED light group 12 includes a heat dissipation plate 120, a substrate 121, and a plurality of LEDs 122.
  • the LED light group 12 is located on the light incident side of the light guide plate 11. According to the light emitting path of the LED, it is not difficult to find that the light emitted by the LED 13 is strong in front of the LED, and between the adjacent two LEDs. The LED light in the front area of the area is weak. It is worth noting that the front side of the LED refers to the orthogonal projection direction of the LED perpendicular to the light incident end face of the light guide plate. Similarly, between two adjacent LEDs. The front side of the area means that the area between the adjacent two LEDs is perpendicular to the orthographic projection direction of the light incident end face of the light guide plate.
  • a plurality of light absorbing layer structures and a plurality of light reflecting layer structures are disposed between the optical film and the plastic frame 14 , and the orthographic projection of the light absorbing layer structure on the back plate bottom plate and the LED on the back plate bottom plate
  • the light absorbing layer structure can absorb part of the light at the bright band of the lamp shadow region, so that the light at the bright band of the lamp shadow region is weakened;
  • the reflective layer structure can reflect the light that has been emitted from the light guide plate and the optical film back to the dark band of the lamp shadow region, thereby enhancing the light intensity at the dark band of the lamp shadow region.
  • the design can make the light on the light side of the backlight module tend to be uniform, effectively improving the light shadow phenomenon of the backlight module, improving the picture quality of the backlight module, and thereby improving the screen display effect of the
  • the specific structure type of the light absorbing layer structure is not limited, for example, it may be a light absorbing tape or a light absorbing film layer.
  • the specific structure type of the light reflecting layer structure is not limited, and may be, for example, a reflective tape or a reflective film layer.
  • the light absorbing tape and the reflective tape may be an integral structure.
  • the assembly process of the backlight module can be simplified, and the production efficiency of the backlight module can be improved.
  • each of the light absorbing tape and the reflective tape may also be in a block shape, spaced between the optical film and the plastic frame, and the orthographic projection of the block light absorbing tape on the back plate bottom plate and the orthographic projection position of the LED on the back plate bottom plate.
  • the orthographic projection of the block reflective tape on the backplane floor is opposite to the orthographic projection of the gap between adjacent LEDs on the backplane floor.
  • the light absorbing layer structure is a light absorbing film layer and the light reflecting structure is a light reflecting film layer
  • the light absorbing film layer and the light reflecting film layer are disposed at an inner side of the front wall of the plastic frame.
  • an embodiment of the present invention provides a display module, including the backlight module according to any one of the above technical solutions.
  • the display module further includes a front frame 17, a liquid crystal panel 16 disposed between the front frame 17 and the backlight module.
  • the backlight module of the display module has relatively uniform light on the light incident side. The picture quality is higher, so the display of the display module is better.
  • the embodiment of the invention provides a display device, which comprises the display module described in the above technical solution.
  • the display device has a high picture quality and a good display effect.
  • 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 screen or the like.

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

Abstract

一种背光模组、显示模组及显示设备。背光模组包括：具有容置空间的背板（10）；顺序放置于背板（10）的容置空间内的反射片（18）、导光板（11）及光学膜片（15）；位于背板（10）的容置空间内且位于导光板（11）入光侧的LED灯组（12），每个LED灯组（12）包括多个LED（122）；位于光学膜片（15）上方且与背板（10）连接的胶框（14）；设置于光学膜片（15）和胶框（14）之间的多个吸光层结构（21）和多个反光层结构（22），吸光层结构（21）与LED（122）在背板（10）底板上的正投影相对，反光层结构（22）与相邻两个LED（122）之间的间隙在背板（10）底板上的正投影相对。吸光层结构（21）可以吸收明带处的部分光线，反光层结构（22）可以将从光学膜片（15）射出的部分光线反射回暗带处，从而使背光模组入光侧光线整体趋于均匀，有效改善了灯影现象，提升了显示设备的画面品质。

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201521029436.X、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式和侧入式两种。侧入式背光模组中，LED灯条位于导光板的侧端，该类背光模组主要应用于笔记本、掌上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，侧入式背光模组同样也开始应用于较大尺寸的显示设备，为用户带来更好的视觉感受。
侧入式背光模组的结构主要包括：具有容置空间的背板；位于背板的容置空间内顺序放置的反射片、导光板和光学膜片；位于背板的容置空间内且位于导光板入光侧的LED灯组；以及位于光学膜片上方且与背板连接的胶框。其中，背板10、导光板11以及LED灯组12的结构如图1所示。
现有技术中，由于LED灯组12的LED的发光角度所限，如图1所示，在每个LED正对的区域光线比较强，因此在LED正对的区域会形成亮度比较大的明带A1，在相邻两个LED之间的间隙正对的区域会形成亮度比较小的暗带A2，由此形成的明暗相间的现象，称为灯影。灯影的存在使得显示设备的显示画面品质较差。
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，以改善背光模组的灯影现象，进而提升显示设备的画面品质。
本发明提供了一种背光模组，包括：具有容置空间的背板；顺序放置于 所述背板的容置空间内的反射片、导光板以及光学膜片；位于背板的容置空间内且位于导光板入光侧的LED灯组，每个LED灯组包括多个LED；位于光学膜片上方且与所述背板连接的胶框；所述背光模组还包括：
设置于光学膜片和胶框之间的多个吸光层结构和多个反光层结构，所述吸光层结构与LED在背板底板上的正投影位置相对，所述反光层结构与相邻LED之间的间隙在背板底板上的正投影位置相对。
本发明提供的背光模组，吸光层结构可以吸收灯影区域明带处的部分光线，反光层结构可以将从导光板和光学膜片射出的部分光线反射回灯影区域的暗带处，从而使背光模组入光侧光线整体趋于均匀，有效改善了背光模组的灯影现象，进而提升了显示设备的画面品质。
较优的，所述吸光层结构为吸光胶带，所述反光层结构为反光胶带。
更优的，所述多个吸光层结构和多个反光层结构为一体结构。
较优的，所述吸光层结构为设置于胶框前壁内侧的吸光膜层，所述反光层结构为设置于胶框前壁内侧的反光膜层。
本发明提供的显示模组，包括根据上述任一技术方案所述的背光模组。该显示模组的背光模组，入光侧光线较为均匀，画面品质较高，因而显示模组的画面显示效果较好。
本发明提供了一种显示设备，包括根据上述技术方案所述的显示模组。该显示设备的画面品质较高，显示效果较好。
可选的，所述显示设备包括液晶电视机、液晶显示器或者手机显示屏。
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为现有技术背光模组结构示意图；
图2为本发明实施例背光模组俯视示意图；
图3为本发明实施例显示模组截面示意图。
附图标记：
10-背板
11-导光板
12-LED灯组
120-散热板
121-基板
122-LED
13-LED发出的光线
14-胶框
15-光学膜片
16-液晶面板
17-前框
18-反射片
21-吸光层结构
22-反光层结构
A1-明带
A2-暗带
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2和图3所示，本发明实施例提供的背光模组，包括：具有容置空间的背板10；顺序放置于背板10的容置空间内的反射片18、导光板11以及光学膜片15；位于背板10的容置空间内且位于导光板11入光侧的LED灯组12，每个LED灯组12包括多个LED122；位于光学膜片15上方且与背板10连接的胶框14；背光模组还包括：
设置于光学膜片15和胶框14之间的多个吸光层结构21和多个反光层结构22，吸光层结构在背板底板上的正投影与LED在背板底板上的正投影位置相对，反光层结构在背板底板上的正投影与相邻LED之间的间隙在背板底板上的正投影位置相对。
其中，LED灯组12包括散热板120、基板121以及多个LED122。
请参考图2所示，LED灯组12位于导光板11的入光侧，根据LED的发光光路，不难发现，在LED正前方，LED发出的光线13较强，相邻两个LED之间区域的正前方区域的LED光线较弱，值得注意的是，这里所说的LED正前方，指的是LED垂直于导光板入光端面的正投影方向，类似的，相邻两个LED之间区域的正前方，指的是相邻两个LED之间的区域垂直于导光板入光端面的正投影方向。
在本发明实施例中，在光学膜片和胶框14之间设置有多个吸光层结构和多个反光层结构，吸光层结构在背板底板上的正投影与LED在背板底板上的正投影位置相对，吸光层结构可以吸收灯影区域明带处的部分光线，使灯影区域明带处的光线减弱；反光层结构在背板底板上的正投影与相邻两个LED之间的间隙在背板底板上的正投影位置相对，反光层结构可以将已经射出导光板及光学膜片的光线再次反射回灯影区域的暗带处，从而使灯影区域的暗带处光线增强，采用这样的设计，可以使背光模组入光侧光线趋于均匀，有效改善了背光模组的灯影现象，提升了背光模组的画面品质，进而提高了显示设备的画面显示效果。
其中，吸光层结构的具体结构类型不限，例如可以为吸光胶带或者吸光膜层，同理，反光层结构的具体结构类型也不限，例如可以为反光胶带或者反光膜层。
当吸光层结构为吸光胶带，反光层结构为反光胶带时，吸光胶带和反光胶带可以为一体结构。通过在一条胶带上间隔设置吸光层和反光层，这样可以简化背光模组的组装工序，从而可以提高背光模组的生产效率。当然，各个吸光胶带和反光胶带也可以为块状，间隔设置于光学膜片和胶框之间，并且块状吸光胶带在背板底板上的正投影与LED在背板底板上的正投影位置相对，块状反光胶带在背板底板上的正投影与相邻LED之间的间隙在背板底板上的正投影位置相对。
当吸光层结构为吸光膜层，反光结构为反光膜层时，吸光膜层和反光膜层间隔设置于胶框的前壁内侧。
如图3所示，本发明实施例提供了一种显示模组，包括根据上述任一技术方案所述的背光模组。其中，显示模组还包括前框17、设置于前框17和背光模组之间的液晶面板16。该显示模组的背光模组，入光侧光线较为均匀， 画面品质较高，因而显示模组的画面显示效果较好。
本发明实施例提供了一种显示设备，包括上述技术方案所述的显示模组。该显示设备的画面品质较高，显示效果较好。
在本发明实施例中，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。
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 (7)

  1. 一种背光模组，包括：具有容置空间的背板；顺序放置于所述背板的容置空间内的反射片、导光板以及光学膜片；位于背板的容置空间内且位于导光板入光侧的LED灯组，每个LED灯组包括多个LED；位于光学膜片上方且与所述背板连接的胶框；其特征在于，所述背光模组还包括：
    设置于光学膜片和胶框之间的多个吸光层结构和多个反光层结构，所述吸光层结构与LED在背板底板上的正投影位置相对，所述反光层结构与相邻LED之间的间隙在背板底板上的正投影位置相对。
  2. 根据权利要求1所述的背光模组，其特征在于，所述吸光层结构为吸光胶带，所述反光层结构为反光胶带。
  3. 根据权利要求2所述的背光模组，其特征在于，所述多个吸光层结构和多个反光层结构为一体结构。
  4. 根据权利要求1所述的背光模组，其特征在于，所述吸光层结构为设置于胶框前壁内侧的吸光膜层，所述反光层结构为设置于胶框前壁内侧的反光膜层。
  5. 一种显示模组，其特征在于，包括根据权利要求1～4任一项所述的背光模组。
  6. 一种显示设备，其特征在于，包括根据权利要求5所述的显示模组。
  7. 根据权利要求6所述的显示设备，其特征在于，所述显示设备包括液晶电视机、液晶显示器或者手机显示屏。
PCT/CN2016/088992 2015-12-10 2016-07-06 一种背光模组、显示模组及显示设备 Ceased WO2017096864A1 (zh)

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