WO2017075954A1 - 背光模组及显示设备 - Google Patents

背光模组及显示设备 Download PDF

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Publication number
WO2017075954A1
WO2017075954A1 PCT/CN2016/081569 CN2016081569W WO2017075954A1 WO 2017075954 A1 WO2017075954 A1 WO 2017075954A1 CN 2016081569 W CN2016081569 W CN 2016081569W WO 2017075954 A1 WO2017075954 A1 WO 2017075954A1
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WIPO (PCT)
Prior art keywords
backlight module
liquid crystal
crystal panel
display device
printed circuit
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PCT/CN2016/081569
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English (en)
French (fr)
Inventor
王飞
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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Publication of WO2017075954A1 publication Critical patent/WO2017075954A1/zh

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    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • the structure of the liquid crystal display device generally includes a backlight module 1, a liquid crystal panel 2, and a front frame 3.
  • the front frame 3 is connected to the backlight module 1, and the liquid crystal panel 2 is fixed to the backlight module 1 and the front frame 3. between.
  • the above prior art has a defect in that, as shown in FIG. 1b, the upper polarizer of the liquid crystal panel 2 causes warpage of the liquid crystal panel 2 when shrinking, and the warped liquid crystal panel 2 and the front frame 3 are pressed, thereby causing The display screen of the display device leaks light and the display quality is poor.
  • the invention provides a backlight module and a display device, which can improve the light leakage defect of the display device and improve the display quality of the product.
  • the backlight module provided by the present invention comprises a backboard and a plastic frame connected to the backboard, wherein the bottom wall of the backboard has an arch-shaped curvature protruding toward the back side of the backlight module along the length direction, and the backboard is along the length direction
  • the two side walls match the arcuate curved shape of the bottom wall.
  • the bottom wall of the backboard has an arched curvature convex toward the back side of the backlight module along the length direction, and the two sidewalls of the backboard along the length direction match the arched curved shape of the bottom wall, so that After the plastic frame is coupled with the back plate, the two side portions of the plastic frame along the length direction are also matched with the arched curved shape of the bottom wall, and the front side surface of the backlight module is arched with the bottom wall. Curved surfaces that match the curved shape.
  • the backlight module After the backlight module is assembled with the liquid crystal panel and the front frame, when the liquid crystal panel is contracted by the upper polarizer When the warpage occurs, the curved surface of the backlight module and the front frame provide a space for the warpage of the liquid crystal panel. Therefore, the liquid crystal panel is not pressed, thereby improving the light leakage of the display device and improving the product. Display quality.
  • the backlight module further includes a printed circuit board cover plate disposed along a length direction of the back plate and fixed to a back side of the back plate by a fastener, the printed circuit board cover plate and the back plate Support spacers are provided between the back sides.
  • the support pad is fixed to the printed circuit board cover.
  • the printed circuit board cover has reinforcing ribs disposed along the length direction.
  • the fastener is a screw
  • the support gasket is a support washer assembled with the screw.
  • the thickness of the support spacer near the arched curved arch is relatively large, adjacent to the arched curved dome The thickness of the support spacer at the place is small.
  • the arched arch has a height of 2 to 3 mm.
  • the present invention further provides a display device, comprising the backlight module of any one of the foregoing aspects, and a front frame and a liquid crystal panel, wherein: the front frame is connected to a backplane of the backlight module, and the liquid crystal The panel is located between the backlight module and the front frame.
  • the liquid crystal panel comprises a planar conversion liquid crystal panel.
  • the display device comprises a liquid crystal television or a liquid crystal display.
  • the display device provided by the present invention provides a space for the warpage of the liquid crystal panel between the curved surface of the backlight module and the front frame when the liquid crystal panel is warped due to shrinkage of the upper polarizer. Therefore, the liquid crystal panel does not It will be oppressed, which will improve the light leakage of the display device and improve the display quality of the product.
  • 1a is a schematic cross-sectional view of a prior art liquid crystal display device
  • 1b is a schematic view showing warpage of a liquid crystal panel in the prior art
  • FIG. 2 is a schematic cross-sectional view (in the length direction) of a backlight module according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a back panel and a frame assembly (in the length direction) according to an embodiment of the present invention
  • FIG. 4a is a schematic cross-sectional view (in the length direction) of a display device according to an embodiment of the present invention
  • FIG. 4b is a schematic view (in the length direction) of a liquid crystal panel according to an embodiment of the present invention.
  • 5a is a top view of a printed circuit board cover plate and a back plate assembly according to an embodiment of the present invention
  • Figure 5b is a schematic cross-sectional view of the A-A of Figure 5a.
  • the backlight module 100 of the embodiment of the present invention includes a backplane 110 and a plastic frame 120 connected to the backplane 110.
  • the bottom wall 111 of the backplane 110 has a convex backlight pattern along the length direction.
  • the arcuate curvature of the back side of the group 100, the two side walls 112 of the backing plate 110 along the length direction match the arched curved shape of the bottom wall 111.
  • the back side refers to the side facing the viewer of the display device
  • the front side refers to the side facing the viewer of the display device
  • the main structure of the backlight module generally includes a reflective sheet 160 , a light guide plate 170 , a light source (not shown), and a film material, as shown in FIG. 2 . Group 180, etc.
  • the liquid crystal panel when the upper polarizer of the liquid crystal panel shrinks, the liquid crystal panel is warped, and the warped liquid crystal panel and the front frame are pressed, thereby causing light leakage of the display screen of the display device.
  • the bottom wall 111 of the back plate 110 has an arch-shaped curvature protruding toward the back side of the backlight module 100 along the length direction, and the back plate 110 is along the length direction.
  • the two side walls 112 are matched with the arched shape of the bottom wall 111.
  • the arcuate curved shapes are matched, and the components such as the pressing reflection sheet 160, the light guide plate 170, the film group 180, and the like are attached to the arched curved shape of the bottom wall 111 of the backing plate 110, and thus, the front of the backlight module 100
  • the side surface is a curved surface that matches the arcuate curved shape of the bottom wall 111.
  • the backlight module 100 As shown in FIG. 4a and FIG. 4b, after the backlight module 100 provided in this embodiment is combined with the liquid crystal panel 200 and the front frame 300, the backlight module 100 is warped when the liquid crystal panel 200 is warped due to shrinkage of the upper polarizer.
  • the curved surface between the curved surface and the front frame 300 provides a space for the warpage of the liquid crystal panel 200. Therefore, the liquid crystal panel 200 is not pressed, thereby improving the light leakage of the display device and improving the display quality of the product.
  • the arched height h of the arch is 2 to 3 mm.
  • the shape of the back plate 110 and the front frame 300 can provide an appropriate accommodation space for the warpage of the liquid crystal panel 200.
  • the specific value of the arch height can be determined according to the specific size of the display device and the amount of warpage of the liquid crystal panel. determine.
  • the backlight module further includes a longitudinal direction along the backplane 110 and is fixed by the fastener 150.
  • a support pad 140 is disposed between the printed circuit board cover 130 on the back side and the back side of the back plate 110.
  • the display device typically also includes a printed circuit board (not shown) that is coupled to the liquid crystal panel.
  • a printed circuit board (not shown) that is coupled to the liquid crystal panel.
  • the printed circuit board is fixed to the back side of the backlight module through the printed circuit board cover.
  • the support pad 140 is supported between the printed circuit board cover 130 and the back side of the back plate 110, and can improve the structural strength of the back plate 110, so that the arched shape of the bottom wall of the back plate 110 is not easily deformed, thereby improving the entire backlight. The reliability of the module structure.
  • the fastener 150 is a screw
  • the support spacer 140 is a support washer that is combined with the screw. It is worth mentioning that in other embodiments of the invention, the support spacers and the screws may also be staggered without a mating relationship.
  • the support pad 140 is preferably fixed to the printed circuit board cover 130, such that the printed circuit board cover 130 is When the backboard 110 is assembled, it is not necessary to separately assemble the support spacers 140, thereby reducing the difficulty of assembly and improving the assembly efficiency.
  • the printed circuit board cover 130 is provided with reinforcing ribs 131 disposed along the length direction.
  • the number of the ribs 131 is not limited, and may be, for example, one, two or more.
  • the thickness of the support spacer near the arched curved arch is relatively large, and the support pad near the arched curved dome
  • the thickness of the sheet is small.
  • the thickness of the support spacer 140 is designed according to the gap between the printed circuit board cover 130 and the back side of the back plate 110, thereby providing a strong support for the arch bending of the back plate 110, thereby improving its structural strength.
  • the embodiment of the present invention further provides a display device, including the backlight module 100 of any of the foregoing embodiments, and a front frame 300 and a liquid crystal panel 200, wherein: the front frame 300 and the backlight The backplane 110 of the module 100 is connected, and the liquid crystal panel 200 is located between the backlight module 100 and the front frame 300.
  • the specific type of the liquid crystal panel 200 is not limited, and includes an In-Plane Switching (IPS) liquid crystal panel.
  • the type of the display device may be a liquid crystal television or a liquid crystal display.
  • the liquid crystal panel 200 when the liquid crystal panel 200 is warped due to shrinkage of the upper polarizer, the curved surface of the backlight module 100 and the front frame 300 provide a space for the warpage of the liquid crystal panel 200. Therefore, the liquid crystal panel 200 is not pressed, thereby improving the light leakage of the display device and improving the display quality of the product.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组(100)和显示设备。背光模组(100)包括背板(110)和与背板(110)连接的胶框(120)，背板(110)的底壁(111)沿长度方向具有凸向背光模组(100)背侧的拱形弯曲，背板(110)沿长度方向的两个侧壁(112)与底壁(111)的拱形弯曲形状相匹配，当液晶面板(200)因上偏光片收缩而产生翘曲时，背光模组(100)的弯曲表面与前框(300)之间为液晶面板(200)的翘曲提供了容置空间，因此液晶面板(200)不会受到压迫，从而改善显示设备的漏光不良问题。

Description

背光模组及显示设备
本申请要求在2015年11月06日提交中国专利局、申请号为201520886927.X、发明名称为“背光模组及显示设备”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
本发明涉及显示技术领域，特别是涉及一种背光模组及显示设备。
背景技术
随着科技的不断进步，消费者对平板显示器、平板电视等显示设备的需求也在不断提升，显示设备的结构、外观、性能等各个方面的更新也日益频繁。
如图1a所示，液晶显示设备的结构通常包括背光模组1、液晶面板2和前框3，前框3与背光模组1连接，液晶面板2固定于背光模组1与前框3之间。
上述现有技术存在的缺陷在于，如图1b所示，液晶面板2的上偏光片在收缩时会牵及液晶面板2产生翘曲，翘曲的液晶面板2与前框3产生压迫，从而导致显示设备的显示画面产生漏光，显示品质欠佳。
发明内容
本发明提供了一种背光模组及显示设备，以改善显示设备的漏光不良，提高产品的显示品质。
本发明提供的背光模组，包括背板和与背板连接的胶框，所述背板的底壁沿长度方向具有凸向背光模组背侧的拱形弯曲，所述背板沿长度方向的两个侧壁与所述底壁的拱形弯曲形状相匹配。
在本发明技术方案中，背板的底壁沿长度方向具有凸向背光模组背侧的拱形弯曲，背板沿长度方向的两个侧壁与底壁的拱形弯曲形状相匹配，这样，胶框在与背板组配连接后，胶框沿长度方向的两个侧边部也会与底壁的拱形弯曲形状相匹配，背光模组的前侧表面为与底壁的拱形弯曲形状相匹配的弯曲表面。背光模组与液晶面板和前框组配后，当液晶面板因上偏光片收缩而 产生翘曲时，背光模组的弯曲表面与前框之间为液晶面板的翘曲提供了容置空间，因此，液晶面板不会受到压迫，从而改善了显示设备的漏光不良，提高了产品的显示品质。
优选的，背光模组还包括沿所述背板的长度方向设置并通过紧固件固定于所述背板背侧的印刷电路板盖板，所述印刷电路板盖板与所述背板的背侧之间设置有支撑垫片。
较佳的，所述支撑垫片固定于所述印刷电路板盖板。
较佳的，所述印刷电路板盖板具有沿长度方向设置的加强筋。
具体的，所述紧固件为螺钉，所述支撑垫片为与所述螺钉组配的支撑垫圈。
较佳的，所述印刷电路板盖板与所述背板的背侧之间，靠近所述拱形弯曲的拱脚处的支撑垫片的厚度较大，靠近所述拱形弯曲的拱顶处的支撑垫片的厚度较小。
优选的，所述拱形弯曲的拱高为2～3毫米。
本发明还提供了一种显示设备，包括前述任一技术方案所述的背光模组，以及前框和液晶面板，其中：所述前框与所述背光模组的背板连接，所述液晶面板位于所述背光模组与所述前框之间。
可选的，所述液晶面板包括平面转换液晶面板。
可选的，所述显示设备包括液晶电视或液晶显示器。
本发明所提供的显示设备，当液晶面板因上偏光片收缩而产生翘曲时，背光模组的弯曲表面与前框之间为液晶面板的翘曲提供了容置空间，因此，液晶面板不会受到压迫，从而改善了显示设备的漏光不良，提高了产品的显示品质。
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1a为现有技术液晶显示设备的截面结构示意图；
图1b为现有技术中液晶面板翘曲示意图；
图2为本发明实施例背光模组的截面结构示意图(沿长度方向)；
图3为本发明实施例中背板与框架组配示意图(沿长度方向)；
图4a为本发明实施例显示设备的截面结构示意图(沿长度方向)；
图4b为本发明实施例中液晶面板翘曲示意图(沿长度方向)；
图5a为本发明实施例中印刷电路板盖板与背板组配俯视图；
图5b为图5a的A-A处截面结构示意图。
附图标记：
1-背光模组(现有技术)；
2-液晶面板(现有技术)；
3-前框(现有技术)；
100-背光模组；
200-液晶面板；
300-前框；
110-背板；
120-胶框；
130-印刷电路板盖板；
140-支撑垫片；
150-紧固件；
160-反射片；
170-导光板；
180-膜材组；
111-底壁；
112-侧壁；
131-加强筋。
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100，包括背板110和与背板110连接的胶框120，背板110的底壁111沿长度方向具有凸向背光模组100背侧的拱形弯曲，背板110沿长度方向的两个侧壁112与底壁111的拱形弯曲形状相匹配。
在本发明的各实施例中，所述背侧指背向显示设备观看者的一侧，所述前侧则指面向显示设备观看者的一侧。
如图2所示，对于本领域人员可知，除背板110和胶框120外，背光模组的主要结构通常还包括反射片160、导光板170、光源(图中未示出)、膜材组180等。
现有的液晶显示设备，液晶面板的上偏光片在收缩时会牵及液晶面板产生翘曲，翘曲的液晶面板与前框产生压迫，从而导致显示设备的显示画面产生漏光。
如图2和图3所示，在本发明实施例的技术方案中，背板110的底壁111沿长度方向具有凸向背光模组100背侧的拱形弯曲，背板110沿长度方向的两个侧壁112与底壁111的拱形弯曲形状相匹配，这样，胶框120在与背板110组配连接后，胶框120沿长度方向的两个侧边部也会与底壁111的拱形弯曲形状相匹配，并且，压迫反射片160、导光板170、膜材组180等部件与背板110的底壁111的拱形弯曲形状相贴合，因此，背光模组100的前侧表面为与底壁111的拱形弯曲形状相匹配的弯曲表面。
如图4a和图4b所示，将该实施例提供的背光模组100与液晶面板200和前框300组配后，当液晶面板200因上偏光片收缩而产生翘曲时，背光模组100的弯曲表面与前框300之间为液晶面板200的翘曲提供了容置空间，因此，液晶面板200不会受到压迫，从而改善了显示设备的漏光不良，提高了产品的显示品质。
较佳的，如图2所示，拱形弯曲的拱高h为2～3毫米。该形状的背板110与前框300组配后能够为液晶面板200的翘曲提供恰当的容置空间，拱高的具体数值可根据显示设备的具体规格尺寸以及液晶面板的翘曲变形量来确定。
随着显示设备薄形化的发展趋势，背板的厚度也越来越薄。在上述实施例的基础上，为了提升背板的结构强度，如图5a和图5b所示，该实施例中，背光模组还包括沿背板110的长度方向设置并通过紧固件150固定于背板110 背侧的印刷电路板盖板130，印刷电路板盖板130与背板110的背侧之间设置有支撑垫片140。
显示设备通常还包括与液晶面板连接的印刷电路板(图中未示出)。在液晶面板与背光模组和前框组配后，印刷电路板通过印刷电路板盖板固定于背光模组的背侧。支撑垫片140支撑于印刷电路板盖板130与背板110的背侧之间，可以提升背板110的结构强度，使背板110的底壁的拱形弯曲不易产生变形，从而提升整个背光模组结构的可靠性。
具体的，该实施例中，紧固件150为螺钉，支撑垫片140为与螺钉组配的支撑垫圈。值得一提的是，在本发明的其它实施例中，支撑垫片与螺钉也可以错开设置而无组配关系。
在本发明的优选实施例中，为了降低印刷电路板盖板130与背板110的组配难度，支撑垫片140优选固定于印刷电路板盖板130，这样在将印刷电路板盖板130与背板110组装时，无需单独组装支撑垫片140，从而降低了组配难度，提高了组配效率。
此外，如图5a所示，为了增加印刷电路板盖板130的结构强度，从而进一步提升背板110的结构强度，印刷电路板盖板130上设计有沿长度方向设置的加强筋131。加强筋131的数量不限，例如可以为一条、两条或者多条。
如图5b所示，印刷电路板盖板130与背板110的背侧之间，靠近拱形弯曲的拱脚处的支撑垫片的厚度较大，靠近拱形弯曲的拱顶处的支撑垫片的厚度较小。根据印刷电路板盖板130与背板110背侧的间隙来设计支撑垫片140的厚度，从而为背板110的拱形弯曲提供有力支撑，提升其结构强度。
可参考前述实施例附图所示，本发明实施例还提供了一种显示设备，包括前述任一实施例的背光模组100，以及前框300和液晶面板200，其中：前框300与背光模组100的背板110连接，液晶面板200位于背光模组100与前框300之间。
液晶面板200的具体类型不限，包括平面转换(In-Plane Switching，简称IPS)液晶面板，显示设备的类型可以为液晶电视或液晶显示器等。
本发明实施例所提供的显示设备，当液晶面板200因上偏光片收缩而产生翘曲时，背光模组100的弯曲表面与前框300之间为液晶面板200的翘曲提供了容置空间，因此，液晶面板200不会受到压迫，从而改善了显示设备的漏光不良，提高了产品的显示品质。
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 (10)

  1. 一种背光模组，包括背板和与背板连接的胶框，其特征在于，
    所述背板的底壁沿长度方向具有凸向背光模组背侧的拱形弯曲，所述背板沿长度方向的两个侧壁与所述底壁的拱形弯曲形状相匹配。
  2. 根据权利要求1所述的背光模组，其特征在于，还包括沿所述背板的长度方向设置并通过紧固件固定于所述背板背侧的印刷电路板盖板，所述印刷电路板盖板与所述背板的背侧之间设置有支撑垫片。
  3. 根据权利要求2所述的背光模组，其特征在于，所述支撑垫片固定于所述印刷电路板盖板。
  4. 根据权利要求2所述的背光模组，其特征在于，所述印刷电路板盖板具有沿长度方向设置的加强筋。
  5. 根据权利要求2所述的背光模组，其特征在于，所述紧固件为螺钉，所述支撑垫片为与所述螺钉组配的支撑垫圈。
  6. 根据权利要求2所述的背光模组，其特征在于，所述印刷电路板盖板与所述背板的背侧之间，靠近所述拱形弯曲的拱脚处的支撑垫片的厚度较大，靠近所述拱形弯曲的拱顶处的支撑垫片的厚度较小。
  7. 根据权利要求1～6任一项所述的背光模组，其特征在于，所述拱形弯曲的拱高为2～3毫米。
  8. 一种显示设备，其特征在于，包括根据权利要求1～7任一项所述的背光模组，以及前框和液晶面板，其中：
    所述前框与所述背光模组的背板连接，所述液晶面板位于所述背光模组与所述前框之间。
  9. 根据权利要求8所述的显示设备，其特征在于，所述液晶面板包括平面转换液晶面板。
  10. 根据权利要求8或9所述的显示设备，其特征在于，所述显示设备包括液晶电视或液晶显示器。
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